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Encyclopedia results for Optical disc

Optical disc





Encyclopedia results for Optical disc

  1. Optical disc authoring

    Unreferenced date February 2008 Optical disc authoring Optical disc authoring , including DVD authoring DVD and Optical disc authoring Blu ray Disc Blu ray Disc authoring often referred to colloquially ... logical volume format to then be recorded burned onto an optical disc typically a compact disc or DVD . Process To burn an optical disc, one usually first creates an optical disc image with a full file system designed for the optical disc, and then burns the image to the disc. The disc ... on the disc. Many optical disc authoring software create the disc image and burn in one ... time. There are also packet writing applications that do not require writing the entire disc at once, but allow writing parts at a time, allowing the disc to be used in the same way as rewritable media such as a floppy disk . There exist many optical disc authoring technologies for optimizing the authoring ... tracks and Data tracks. Hardware main Optical disc drive Authoring is commonly done in software on computers with optical disc recorder s. There are, however, stand alone devices like personal video recorder s which can also author and record discs. Software Use of optical disc recorders require optical disc authoring software , sometimes called burning applications or burner applications ... an optical disc usually involves first creating an optical disc image with a full file system designed for the optical disc, and then actually burning the image to the disc. Many programs create ... a very large floppy, though with unique constraints . See also List of optical disc authoring software ... formats DEFAULTSORT Optical Disc Authoring Category Computer storage media Category Optical disc authoring ... for learning this distinction is that creating the disc image is an expensive time consuming process. Most disc writing applications will silently delete this image from the Temporary folder in which it was built unless users instruct the disc burning application to preserve the image, which can ...   more details



  1. Optical disc recording modes

    Optical disc authoring In optical disc authoring , there are multiple modes for recording, including Disc At Once , Track At Once , and Session At Once . CD Disc At Once Disc At Once or DAO for CD R media is a mode that Master recording masters the disc contents in one pass, rather than a Track CD track at a time as in Track At Once. DAO mode, unlike TAO mode, allows any amount of audio data or no data at all to be written in the pre gaps between tracks. One use of this technique, for example, is to burn track introductions to be played before each track starts. A CD player will generally display a negative time offset counting up to the next track when such pre gap introductions play. Pregap Pre gap audio before the first track of the CD makes it possible to burn an unnumbered, hidden audio track. This track can only be accessed by rewinding from the start of the first track, backwards into the Pregap pre gap audio. DAO recording is also the only way to write data to the unused R W sub channels. This allows for extended graphic and text features on an audio CD such as CD G and CD Text . It is also the only way to write audio files that link together seamlessly with no gaps, a technique ... R disc at once. Session At Once Session at Once or SAO recording allows multiple sessions to be recorded and finalize optical discs finalized on a single disc. The resulting disc can be read by computer ... Category Computer storage media Category Optical disc authoring ca DAO de Disc At Once es Disk At Once fr Disk At Once pl Disc At Once ru uk Disc At Once ... 1 Mode 2 XA DVD R Disc At Once Disc At Once recording for DVD R media is a mode in which all data is written sequentially to the disc in one uninterrupted recording session. The on disk contents result ... yec helpcenter manuals F1.PDF ref . It uses a Disc At Once method with a fixed linear recording ..., the quantity of information that can fit on a disc is less than with a normal method 63 minutes ...   more details



  1. Optical disc recording technologies

    Refimprove date May 2009 Optical disc authoring Optical disc authoring requires a number of different optical disc recorder technologies working in tandem, from the optical disc media to the firmware to the control electronics of the optical disc drive . This article discusses some of the more important technologies. Types of recordable optical disc There are numerous formats of recordable optical ... and lands created when a commercial optical disc is pressed. Emerging technologies such as holographic data storage and 3D optical data storage aim to use entirely different data storage methods, but these products are in development and are not yet widely available. The earliest form is magneto optical ... time. Recording modes main Optical disc recording modes Optical discs can be recorded in Disc At Once , Track At Once , Session at Once i.e. multiple burning sessions for one disc , or packet writing modes. Each mode serves different purposes Disc At Once writes the entire disc in one pass preferred ... on demand see below Connection technologies Unlike early CD ROM drives, optical disc recorder ...? DEFAULTSORT Optical Disc Recording Technologies Category Compact Disc .... The most common form of recordable optical media is write once organic dye technology, popularized ... or pale yellow or green. Rewritable, non magnetic optical media are possible using phase change ... . ref name Millenniata http millenniata.com m disc M Disc millenniata.com. 2010 11 24. Retrieved ... Nearly all burners can slow the rotation of the disc and record at a slower rate. A burner may do ... gap in the recorded track on the disc. ref http web.archive.org web 20071117015804 http www.ricoh.com ... disc. When using rewritable media CD RW , DVD RW , DVD RAM , the Universal Disk Format UDF file system organizes the disc into packets that are written individually. The packets are referenced ... that allows optical discs to be used in a similar manner to a floppy disk . Packet writing can ...   more details



  1. Nintendo optical disc

    Infobox media name Nintendo optical discs logo image Image Nintendo GameCube Game Disc and Wii Optical Disc.jpg 256px caption Nintendo GameCube Game Disc and Wii Optical Disc type Read only memory Read only optical disc encoding Digital capacity GCN 80  mm 1.4  gigabyte GB br Wii 120  mm ... media br 120  mm Wii U game media extended from extended to optical disc authoring Nintendo optical discs are the optical disc format used to distribute video game s released by Nintendo . This includes the Nintendo GameCube Game Disc and Wii Optical Disc . The physical size of a Nintendo GameCube Game Disc is that of a miniDVD , and the Wii Optical Disc is the size of a DVD . It was announced that Wii Optical Discs can be used in the Wii U , while the GameCube disc can be used in the Wii for backward compatibility . A burst cutting area is located at the inner ring of the disc surface. Format File NODcut.jpg thumb left A section of the BCA of a Nintendo Optical Disc with two of the six additional cuts visible. The Nintendo GameCube Game Disc DOL 006 is the recording medium medium for the Nintendo ... optical disc contains a burst cutting area BCA mark, a type of barcode that is written to the disc ... DVD Category 80 mm discs Category 120 mm discs ar ca Nintendo Optical Disc cs Optick disk Nintendo es Nintendo Optical Disc fr Disque optique Nintendo it Nintendo Optical Disc ja Wii pl Nintendo optical disc pt Disco ptico da Nintendo ... IGN ref The GameCube Game Disc is a 1.4  GB, ref cite web url http www.avrev.com home theater ... accessdate 2011 07 06 ref The GameCube Game Disc was often criticized by game developers Which? date ... had to use more compression to fit on a single disc, reducing their quality. Prior to the Nintendo ..., Nintendo extended the technology to use a full size 12  cm, 4.7 8.54  GB DVD based disc RVL 006 , enabling it to have the benefits of the Nintendo GameCube Game Disc, while having the standard ...   more details



  1. Optical disc drive

    in a Sony Vaio E series laptop Optical disc authoring Image Optical drive lens.JPG thumb The CD DVD ... In computing , an optical disc drive ODD is a disk drive that uses laser light or electromagnetic ... data to or from optical disc s. Some drives can only read from discs, but recent drives are commonly both readers and recorders, also called burners or writers. Compact disc s, DVD s, and Blu ray disc s are common types of optical media which can be read and recorded by such drives. Optical ... , etc. Optical disc drives are an integral part of stand alone consumer appliances such as CD ... signal was stored as an analog format like a video cassette. The first digitally recorded optical disc ... disc drive is an optical path , placed in a pickup head PUH , ref name dvd Cite book first1 Jim ... volume of sales. When the optical disc drive was first developed, it was not easy to add to computer ... ray disc drives, the laser only has to penetrate 0.1  mm of material. Thus the optical assembly .... This is handled in the same manner as a buffer underun. Recording schemes See also Optical disc recording ... specialised optical disc authoring software authoring software to create an disc image ... ref name Philips The Source IDentification Code SID Code provides an optical disc production facility ... Computer hardware Cue sheet music software ISO image List of optical disc authoring software MultiLevel Recording Optical disc authoring Optical disc recording technologies Optical jukebox Phase ... inch in form factor. Basic computer components ? DEFAULTSORT Optical Disc Drive Category Audio storage Category Optical computer storage Category Optoelectronics Disc drive Category Video storage ar ... ja pl Nagrywarka ru sq Optical disc drive simple Optical disc drive sk Optick ... and consumer media distributed on disc, and to record discs for archival and data exchange purposes. Floppy disk drive s, with capacity of 1.44  MB, have been made obsolete optical media are cheap ...   more details



  1. Optical disc packaging

    Main Optical disc inappropriate tone date April 2008 Optical disc packaging is the packaging that accompanies CD s, DVD s, and other formats of optical disc optical media . Most packaging is rigid or semi ... Optical disc authoring Blank CD and DVD media are often sold in bulk packages called spindles ... not have cases. It is a plastic case with an open right side so the optical disc can be slipped in. The disc ... 2010 DEFAULTSORT Optical Disc Packaging Category Packaging de CD und DVD Verpackungen es Jewel ... case Image Jewel Case 02.jpg thumb A jewel CD case A jewel CD case is the original compact disc case that has been used since the compact disc was first released in 1982. It is a three piece plastic ... of 177.5  mm , which usually contains a compact disc along with the liner notes and a back ... half holding a media tray that grips the disc by its hole. All three parts are made of injection .... In its center is a circular hub of teeth which grip the disc by its hole. This effectively suspends ... not for those that contain major film releases. Blank Blu ray Disc media is also most ... shock or stress. The teeth of the hub holding the disc are also prone to failure by snapping ... in standard thickness jewel cases with hinged media trays which can be lifted to reveal the second disc ... end company Linn HiFi Linn are supplying them. The depth of the disc tray is also greater, allowing ... design from the CD version the inside edge is rounded instead of flat, and the physical position of the disc ... upside down in the case, so that the artwork on the disc itself shows through the transparent back ... polypropylene which is strong enough to protect the disc, but flexible enough not to break easily. Also ... is a paper envelope . More expensive versions add a transparent window to the envelope allowing the disc ... promotionally, but the disc comes in a paper sleeve to cut costs . Q Pack The Q Pack was developed ... with raised top and bottom sections to keep the disc from sliding out if it comes disengaged ...   more details



  1. List of optical disc authoring software

    TOCright This is a list of optical disc authoring software . Open source Multi platform cdrtools , a comprehensive command line based set of tools for creating and burning Compact disc CDs , DVD s and Blu ray s. cdrkit , a fork of cdrtools by the Debian project. cdrdao , open source software for authoring and ripping of CD ROMs in Optical disc recording modes CD Disc At Once Disk At Once mode. Linux and Unix dvd rw tools , a package for DVD and Blu ray Disc writing on Unix and Unix like systems. GUI cdrtools based Brasero software Brasero , a GNOME CD DVD burning application GnomeBaker , a GNOME CD DVD burning application Graveman , a GTK CD DVD burning application project abandoned K3b , the KDE CD DVD authoring program Nautilus file manager Nautilus , the GNOME file manager includes basic CD DVD burning capabilities Serpentine software Serpentine , the GNOME audio CD burning application SimpleBurn , a GTK CD DVD burning application X CD Roast Windows InfraRecorder cdrkit cdrtools based DVD Flick ImgBurn is included Saturn Disk Image , ISO image creation Freeware Windows CDBurnerXP Pro ImgBurn Ashampoo Burning Studio version 6 only DeepBurner DeepBurner Free DVD Decrypter DVD Shrink Mac OS X Disco software Disco Proprietary Mac OS X Adobe Encore DVD Adobe Encore DVD Studio Pro MacTheRipper Roxio Toast Linux GEAR PRO Linux Nero Linux Unix GEAR PRO Unix Windows Adobe Encore DVD Adobe Encore Alcohol 120 Ashampoo Burning Studio AVS Video Editor Blindwrite CDRWIN CloneCD CloneDVD DeepBurner DiscJuggler Easy CD Creator Now obsolete Easy Media Creator Now Roxio Creator Feurio GEAR Video MagicISO Nero Burning ROM Netblender PowerISO Ulead Systems Ulead Corel DVD software UltraISO See also Comparison of disc authoring software Magix Samplitude Sequoia References reflist Optical disc image software Category Lists of software Optical disc authoring software Category Optical disc authoring software es Programas grabadores de discos pticos zh ...   more details



  1. Comparison of high definition optical disc formats

    About comparative HD optical disc formats a history of the Blu ray HD DVD format war High definition optical disc format war This article compares the technical specifications of multiple high definition formats , including HD DVD and Blu ray Disc two mutually incompatible, high definition optical disc ... 19 accessdate 2008 02 19 ref Other high definition optical disc formats were attempted, including the multi layered red laser Versatile Multilayer Disc and a Chinese made format called Enhanced Versatile Disc EVD . Both appear to have been abandoned Citation needed date March 2010 by their respective ... Comparison Of High Definition Optical Disc Formats Category Blu ray Disc Category HD DVD ... definition Optical Media Formats br small DVD included for comparison small br Mandatory codecs must be supported by the player. Each disc must use one or more of the mandatory codecs. style background ... Blu ray Disc style background Gainsboro HD DVD style background Gainsboro CBHD CH DVD style background ... a n a rh colspan 3 Secondary video decoder Picture in picture PiP yes Mandatory for Blu ray Disc ... colspan 3 Secondary audio decoder yes Mandatory for Blu ray Disc Player profiles Bonus View players ... yes BDMV and BD J Blu ray Disc Java yes Standard Content and Advanced Content yes CETC colspan 3 partial Rudimentary n a rh colspan 3 Internet support yes Mandatory for Blu ray Disc Player profiles ... CSS 40 bit None rh colspan 3 Regional lockout Region codes Blu ray Disc Region codes Three region ... rh colspan 3 Anti scratch coating Hardcoating of disc yes Mandatory colspan 5 partial Optional unk ... 2012. First two layers of Blu ray have a 25 GB capacity, but the triple layer disc adds a further ... ray Disc players when the Blu ray Disc Player profiles Bonus View requirement came into effect. However ... DD on the two formats. On Blu ray Disc, DD can only be used to extend a primary Dolby Digital DD 5.1 ... Stats Stats.php title Blu ray Disc Statistics accessdate 2008 07 04 ref br note HDMC table note g ...   more details



  1. High definition optical disc format war

    About the Blu ray HD DVD format war a comparison of formats Comparison of high definition optical disc formats Use mdy dates date August 2010 File Blu ray Disc.svg 175px right Bly ray Disc logo File HD DVD.svg 175px right HD DVD logo A format war took place between the Blu ray Disc and HD DVD optical disc standards for storing High definition video high definition video and audio. These standards emerged ... standard Advanced Optical Disc, ref cite web url http www.pcworld.com article id,104570 ... standards had Comparison of high definition optical disc formats significant differences that made each ... of Specifications for Large Capacity Optical Disc Recording Format Utilizing Blue Violet Laser Blu ray ... Reflist 30em Category Blu ray Disc Category HD DVD Category Mass media rivalries Category Optical computer ... ray disc. On February 19, 2008, Toshiba officially announced that it would stop the development of the HD DVD DVD player players , conceding the format war to the Blu ray Disc format. ref name Toshiba ... laser diode , whose shorter wavelength opened the door to higher density optical media following ... diodes Ultra Density Optical and, with Pioneer Corporation Pioneer , DVR Blue. ref cite web url ..., the project was officially announced as Blu ray Disc Blu ray , ref cite web url http www.newscientist.com ... date 2002 02 19 work newscientist.com ref and the Blu ray Disc Association was founded by a consortium ... date 2003 11 28 work theinquirer.net publisher ref after being voted down twice by Blu ray Disc Association ... war, the Blu ray Disc Association and DVD Forum started to negotiate a compromise in early 2005. One ... ref A much larger issue, though, was the physical formats of the discs themselves the Blu ray Disc ... standard had to change to work more smoothly with personal computers . The Blu ray Disc s representatives ... ref On August 22, 2005, the Blu ray Disc Association and DVD Forum announced that the negotiations ... link date October 2010 bot H3llBot ref Hewlett Packard HP proposed an ultimatum for the Blu ray Disc ...   more details



  1. Disc

    using a flexible disc Hard disk drive , a non volatile magnetic data storage device Optical disc , commonly a polycarbonate disc Blu ray Disc BD , a high density optical disc intended mainly for video storage Compact Disc CD , a form of optical disc used mainly for audio data Digital Versatile Disc DVD , a form of optical disc used mainly for video and other data Enhanced Versatile Disc EVD , an optical ... Disc HD DVD , a high density optical disc intended mainly for video storage Holographic Versatile Disc HVD , a next generation ultra high density optical disc format replacement for Blu ray Laserdisc LD , the first commercial optical disc storage medium MiniDisc MD , a magneto optical disc based data storage device Disc film , a still photography film format RAM disk , a volatile solid state drive ...wiktionary disc disk TOCRight A disc International English or disk American English , from Latin language ... , an analog recording medium LP record a specific type of gramophone record Aluminum disc an analog recording disc used mainly for early radio recordings Acetate disc an aluminium disc coated with nitrocellulose lacquer Science Astronomy Accretion disc , diffuse material in orbital motion around ... and debris in orbit around a star Disc galaxy , a disc shaped group of stars Protoplanetary disk , a rotating disc of dense gas surrounding a newly formed star, a form of accretion disc Scattered disc ... from the receptacle of the flower Intervertebral disc , in animal anatomy, part of the spine Placenta or placental disc, in mammals, an organ that connects a developing fetus to its mother s uterus Optic disc , in the retina Mathematics Disk mathematics , the region in a plane enclosed by a circle ... Disrupted in Schizophrenia 1 , a human gene with a wide array of interactions DISC assessment , in psychology, a group of psychometric tests based on the work of William Moulton Marston Motoring Disc brake , a device for slowing or stopping the rotation of a wheel Disc parking , a parking regulation ...   more details



  1. MODS Disc

    Infobox Storage medium name MODS Disc type High density optical disc capacity ? owner ? The MODS Multiplexed Optical Data Storage Disc is an optical disc optical storage medium that is currently being developed by a group of researchers from Imperial College London . The new disc could have a capacity of 1 Terabyte per single disc. External links http www.windowsitpro.com article news2 one terabyte optical disk technology unveiled.aspx One Terabyte Optical Disc Technology Unveiled http www.nforcershq.com 1tb multiplexed optical data storage 100 dvds on a single disc 1TB Multiplexed Optical Data Storage 100 DVDs on a single disc Category Computer storage media Category Upcoming products compu storage stub de Multiplexed Optical Data Storage it Multiplexed Optical Data Storage ...   more details



  1. Professional Disc

    Disc PFD is a digital recording optical disc format introduced by Sony in 2003 primarily for XDCAM , its new tapeless camcorder system. It was one of the first optical formats to utilize blue laser , which allowed for higher density of data to be stored on optical media compared to infrared laser ... the 23GB disc was released, a dual layer 50 GB was developed and released. This format is sometimes confused with the Blu ray Disc format, another optical disc format using blue violet lasers and supported ...unreferenced date December 2011 Image Xdcam.jpg thumb Professional Disc Infobox media name Professional Disk for DATA logo Image Prodisk data.png image Unsourced image removed Image Prodata media.jpg 220px PDD discs. replacethisimage caption rfu c 2006 12 27 type Optical disc encoding capacity 23 giga ... GB of data to be stored on one 12 cm disc the equivalent to nearly five single layer DVDs, and a 1x ... video devices, both for standard definition and high definition applications. Professional Disc for Data PDD Professional Disc for DATA PDD or ProDATA was a general use recording media variant of PFD ... USB 2.0 drive also became available around the same time. On March 31 2007, Professional Disc for DATA ... Disc drive is an external drive that connects via USB 2.0 to Windows or Mac OS X computers using ... added the ability for computer users to store any computer files on the Professional Disc. http forums.creativecow.net thread 142 866275 866289 See also Blu ray Disc HD DVD Ultra Density Optical Optical disc External links http www.sony.net Products MO Drive ProDATA index.html Sony Global Professional Disc for DATA http www.sonyburners.com prodata index.php Sony Storage Solutions ProData http b2b.sony.com Solutions subcategory recordable media professional media professional disc Sony b2b Professional Disk Category Optical computer storage media de Professional Disc for Data es Professional Disc ja Professional Disc ru PFD ...   more details



  1. Spelling of disc

    , developed the compact disc medium here, the c spelling was chosen. The c spelling is now used consistently for optical media such as the compact disc and similar technologies. ref cite web url ...other uses Disc disambiguation Wiktionary disc disk Disk and disc are the two alternative spellings of the descriptive word for things of a generally thin and circular geometry. These variations are due to the way in which the words originated. The discussion here somewhat focuses on disk storage as an electronic media . Generally in computer terminology , disk refers to magnetic storage while disc refers to Optical disc optical storage . Disc with a hard c is for software. Disk with a hard k is for hardware related disks. Disk The earlier word is disk , which came into the English language in the middle of the 17th century, and probably following pre existing words such as risk it was spelled with a k . The spelling disc was introduced in the 18th century, following an increasing tendency to base the spelling of words on their roots in this case the Latin word discus and the Ancient Greek Greek word note that kappa in Greek is usually Romanization of Greek transliterated by c rather than k . In the 19th century, disk became the conventional spelling for audio recording s made on a flat plate, such as the gramophone record this usage gave rise to the modern term disc jockey . ref cite web url http www.bartleby.com 61 16 C0521600.html title Compact disk year 2000 work The American ... kb HT2300 title What s the difference between a disc and a disk? date accessdate 2012 02 28 ... as a contraction of diskette , a much later word and actually a diminutive of disk . Disc Some ... Washington State University accessdate 2008 06 11 ref See also Disc disambiguation Disc, Disk, DISC ... a disc and a disk? refend Category English spelling Disc Category American and British English differences Category Computing terminology Disc ...   more details



  1. Disc wobble

    Reflist External links http www.wipo.org pctdb en wo.jsp?wo 2004086369 Multilayer optical disc having wobble pits http www.patentstorm.us patents 6298021.html Optical disc and optical disc apparatus for forming wobbled tracks Category DRM systems Category Optical disc copy protection ca Disc Wobble es Disc wobble ...Disc wobble , also called wobble groove, is a technology developed by Royal Philips Electronics NV. This technology together with digital watermarking could ensure that only authentic discs would be played on the next generation players that will respect these proposed forms of copy protection see also Digital rights management . This technique encodes hidden protection data onto the lead in groove along the inner edge of a disc in a difficult to duplicate manner. Normally, discs grooves form a smooth spiral, with the data encoded as reflective and absorptive spots along the path. Disc wobble reshapes the groove by wiggling the path back and forth ever so slightly in a pattern that conveys the ons and offs of digital data. The wobble is too fast for the laser pickup head to physically follow, but the error signals that keep the head s lens on track move in step with the wobble. This allows the protection data to be read by an appropriately equipped player, entirely separate from the normal ... original discs from being copied. If the recording device does not detect the disc as a re writable disc, that is, a read only disc, the device will not be able to copy the data from that disc .... ref cite web author Maurice Maers & Joop Talstra title Inexpensive Media Recognition for Optical ... disc technology and just adding a pregroove wobble detector to devices, this turns out to be a very ... Section OR date February 2011 Although it is a proprietary technology, disc wobble could ... based on disc wobble fails to prevent copying through the analog hole . If a work can be viewed ...   more details



  1. Optic disc

    diagram of the human eye , with the optical disc, or blind spot, at the bottom. Pale disc A normal optic disc is orange to pink in colour. A pale disc is an optic disc which varies in colour from a pale pink or orange colour to white. A pale disc is an indication of a disease condition. Imaging of the optic disc Traditional colour film camera images are the gold standard in imaging, requiring ...Infobox Anatomy Name Optic disc Latin Discus nervi optici GraySubject 225 GrayPage 1015 Image Gray879.png ... The optic disc or optic nerve head is the location where ganglion cell axons exit the human ... spot vision the blind spot or the physiological blind spot . The optic disc represents the beginning ... come together. The optic disc is also the entry point for the major blood vessels that supply the retina ... million neuron s from the eye towards the brain. Anatomy The optic disc is placed 3 to 4  mm to the nasal ... examination The eye is unique because of the transparency of its optical media. Almost all eye structures can be examined with appropriate optical equipment and lenses. Using a modern direct ophthalmoscope gives a view of the optic disc using the principle of reversibility of light. A slit lamp ... lens 66D, 78D or 90D is required for a detailed stereoscopic view of the optic disc and structures inside ..., the eye care physician notes the colour, cupping size as a cup to disc ratio , sharpness of edge, swelling, hemorrhages, notching in the optic disc and any other unusual anomalies. It is useful ... neuritis , anterior ischemic optic neuropathy or papilledema i.e. optic disc swelling produced by raised intracranial pressure , and optic disc drusen . Women in advanced stage of pregnancy with pre eclampsia should be screened by an ophthalmoscopic examination of the optic disc for early evidence of rise ... standardised pictures of the optic disc. Stereoscopic images offer an excellent investigative tool .... Heidelberg Retinal Tomography HRT II , GDx VCC and optical coherence tomography Stratus OCT 3 are the currently ...   more details



  1. Optical storage

    Refimprove date December 2009 Optical storage is a term from engineering referring to the storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light , usually a beam of laser light precisely focused on a spinning disc. An older example, that does not require the use of computers, is microform . There are other means of optically storing data and new methods are in development. Optical storage differs from other computer data storage data storage techniques that make use of other technologies such as magnetism or semiconductor s. Optical storage can range from a single drive reading a single CD ROM to multiple drives reading multiple discs such as an optical jukebox . Single compact discs can hold around 700MB megabyte s and optical jukebox es can hold much more ref Compact Disc http en.wikipedia.org wiki Compact Disc ref . The term optical drive usually refers to a device in a computer that can read CD ROM s or other optical disc s. It is estimated that in the year 2007, optical storage represents 27 of the world s technological capacity to store information ref name HilbertLopez2011 http www.sciencemag.org content 332 6025 60 The World s Technological Capacity to Store, Communicate, and Compute Information , especially http www.sciencemag.org content suppl 2011 02 08 science.1200970.DC1 Hilbert SOM.pdf ... also Data storage device the broader topic of all devices that store data. Optical Media board disc modern optical discs such as CD ROM s and related formats. Optical Jukebox Optical disc drive Optical tape more capacity than magnetic tape but not as cost effective Magneto optical drive combines Optical ... data storage media. HDSS Holographic Data Storage Systems potential new optical storage technology. 3D optical data storage potential new optical storage technology. Optical Storage Technology Association industry trade association References Reflist Optical storage media DEFAULTSORT Optical Storage ...   more details



  1. Disc spanning

    Rotating disc computer storage media Category Optical computer storage ...Unreferenced date January 2011 Disc spanning is a feature of CD and DVD burning software that automatically spreads a large amount of data across many data discs if the data set s size exceeds the storage capacity of an individual blank disc. The advantage is that the user does not need to split up files and directories into two or more blank disc sized pieces by hand. The software may or may not support slicing a single large file in order to span it but all disc spanners can divide numerous files that are smaller than one blank disc s capacity across many discs. Disc spanning works well on CD media in many applications, but spanning on DVD media fails often. This lack of reliable DVD data disc spanning is odd, as disc spanning was used extensively on older 3.5 and 5.25 Floppy disk floppy discs . Most users Who date January 2011 assume every operating system can perform disc spanning on any media as a built in function this is incorrect. Some disc spanning schemes include a small program to reassemble the data set into the same structure it had on the source machine. This program could be written to the first disc only, or to every disc in the set. The use of disc spanning will in most cases make your files unreadable to the file system. Therefore you are bounded to use the same program later on to restore the data. Many users don t want to be bound to such solutions and use Simple disc spanning instead. Simple disc spanning is a solution that groups the files into any media grouped based on size. There is one drawback with this system. Files that are bigger than the target media will not be burnt to the drive. It is simple but powerful and a simple calculation would be How many CD DVD BD HDDVD s does this bunch of files need . The simple grouping can be displayed like ... br br Dir2 br File2 br br Disc3 45 2,130MiB br br Dir3 br etc... blockquote Simple disc spanning ...   more details



  1. Disc rot

    for factory pressed optical disks. Signs of disc rot On CDs, the rot becomes visually noticeable ...Refimprove date September 2010 Image Disc rot.jpg thumb 250px Disc rot Disc rot is a phrase describing the tendency of CD or DVD or other optical disks to become unreadable due to physical or chemical deterioration. The causes of this effect vary from oxidation of the reflective layer, to physical scuffing and abrasion of disk surfaces or edges, including visible scratches, to other kinds of reactions with contaminants, to ultra violet light damage and de bonding of the adhesive used to adhere the layers of the disc together. Causes Unreferenced section date September 2010 In CDs, the reflective layer is immediately beneath a thin protective layer of lacquer , and is also exposed at the edge of the disk. The lacquer protecting the edge of an optical disk can usually be seen without magnification. It is rarely uniformly thick thickness variations are usually visible. The reflective layer is typically .... DVDs have a different structure from CDs, using a plastic disc over the reflecting layer. This means .... Each type of optical disk thus has different susceptibility to contamination and corrosion of its reflecting layer furthermore, the writeable and re writable versions of each optical disk type are somewhat ... disc? ref Discoloration of the disc, which looks like a coffee stain on the disc. See also ... attributed to oxidation in the aluminum layers by poor quality adhesives used to bond the disc ... while double sided disks did. The name Laser Rot is a misnomer the disc degradation does not involve ... and frequency as the disc continued to degrade. Much of the early production run of MCA DiscoVision ..., Indiana were plagued with laser rot. See also CD bronzing DVD D and Flexplay , disposable optical disc formats designed to become unplayable after a limited time Planned obsolescence References Reflist ... at AVS Forums DEFAULTSORT Disc Rot Category Compact Disc Category DVD Category 80 mm discs Category ...   more details



  1. Optical engineering

    Optical engineering is the field of study that focuses on applications of optics . Optical engineers design components of optical instrument s such as lens optics lenses , microscope s, telescope s, and other equipment that utilizes the properties of light . Other devices include optical sensors and measurement systems, laser s, fiber optic communication systems, optical disc systems e.g. CD , DVD , etc. Because optical engineers want to design and build devices that make light do something useful, they must understand and apply the science of optics in substantial detail, in order to know what is physically possible to achieve physics and chemistry . However, they also must know what is practical in terms of available technology, materials, costs, design methods, etc. As with other fields of engineering, computer s are important to many perhaps most optical engineers. They are used with instruments, for simulation, in design, and for many other applications. Engineers often use general computer tools such as spreadsheet s and programming language s, and they make frequent use of specialized optical software designed specifically for their field. Optical engineering metrology uses optical methods to measure micro vibrations with instruments like the laser speckle interferometer or to measure the properties of the various masses with instruments measuring refraction . See also Optical lens design Optician Optical physics SPIE Code V Zemax HEXAGON optical software References references Further reading Driggers, Ronald G. ed. 2003 . Encyclopedia of Optical Engineering. New York Marcel Dekker. 3 vols. ISBN 978 0824709402 Bruce H. Walker, Historical Review,SPIE Press, Bellingham, WA. ISBN 9780819478771. http link.aip.org link doi 10.1117 3.818136.ch2 FTS Yu & Xiangyang Yang 1997 Introduction to Optical Engineering , Cambridge University Press , ISBN 0251574935 . Technology footer Engineering stub Category Optics Category Engineering disciplines ar de Feinoptiker ...   more details



  1. Paper disc

    Onesource date April 2008 Refimprove date April 2008 The paper disc is one of the formats chosen to succeed the DVD . Developed by Sony and Toppan Printing, the disc can be read by Sony s new Blu ray Disc BD format and offers up to 25 GB of storage. It was officially announced on April 15, 2004. ref cite web url http www.sony.net SonyInfo News Press 200404 04 0415E title Press release accessdate 2008 04 15 publisher Sony . ref Paper discs are made of 51 paper by weight. ref cite web url http www.sony.net SonyInfo News Press 200404 04 0415E title Press release accessdate 2008 04 15 publisher Sony ref Basic structure of a paper disk is similar to the ordinary Blu ray Disk. In a BD the recording layer on which the data is stored lies under a 0.1 millimeter protective layer and on top of a 1.1 millimeter thick substrate. The substrate, or basic surface on which a material adheres, is usually made of a polycarbonate plastic, but the new disc replaces this with paper. The result is a disc of which paper makes up approximately 51 percent of its weight, Sony says. Toppan also had been flirting with the paper disc idea at their San Diego location. Toppan had a local San Diego location, Toppan Electronics at 7770 Miramar rd 92126, their Miramar location featured computer chips and some other confidential projects that never surfaced. They closed their doors at the Miramar location for unknown reasons back in 2004 and to this day the location remains an empty building, but is still owned by Toppan. They tried a new division, Toppan Optical Products in Poway in 2004 and made TV screens for rear projection televisions, but it never caught on. This location has since been sold to General Atomics Corp. ref cite web url http www.sony.net SonyInfo News Press 200404 04 0415E title Press release ... 200404 04 0415E Press release Cite journal conference Optical Data Storage 2004 04 18 location Monterey, CA. Miramar, CA date 2004 09 title Sony Toppan 25 GB paper disc based on the blu ray structure ...   more details



  1. Optical tape

    tape or optical discs. For example, the goal of the LOTS project in 1995 was to achieve a data transfer ... contact with a magnetic head. See also Creo Former manufacturer of Optical tape recorders, now a part of Kodak . TRAAMS Tape based Rapid Access Affordable Mass Storage An optical tape technology developed by a consortium led by Terabank , Inc.. LOTS Laser Optical Tape Storage Another optical ... 2001 EmergTechPanel LOTS 20Conf2001.pdf Technical explanation of Laser Optical Tape Storage technology LOTS . ref References Reflist Optical storage media DEFAULTSORT Optical Tape Category Optical computer storage media de Optisches Band ...   more details



  1. Optical jukebox

    An optical jukebox is a robotic data storage device that can automatically load and unload optical disc s, such as Compact Disc , DVD , Ultra Density Optical or Blu ray disc and can provide terabyte s TB and petabyte s PB of tertiary storage . The devices are often called optical disk libraries , robotic drives , or autochanger s. Jukebox devices may have up to 2,000 slots for disks, and usually have a picking device that traverses the slots and drives. The arrangement of the slots and picking devices affects performance, depending on the space between a disk and the picking device. Seek times and transfer rates vary depending upon the optical technology. Jukeboxes are used in high capacity archive .... Optical disc libraries are also useful for making backup s and in disaster recovery situations. Today ... to eight layers and 200 GB per disc. The current format, used in the DISC7000, allows 35 TB of storage from a single 700 disc jukebox. Optical disc libraries like the TeraStack Solution can store ... that moves little used or unused files from fast magnetic storage to optical jukebox devices ... of product attributes. History One of the first examples of an optical Jukebox was the unit designed ... transfers the data to a CD, DVD, UDO or Blu ray disc in the jukebox. The software also provides ... at the same time. If additional users want to use a new disc, they have to wait for the disc ..., files accessed are only sent back to the optical discs after they have been utilized. Changes may ... management software that runs the optical jukebox. The number of drives in the jukebox can be up to 6 depending on the size of the jukebox. The drives will read and write the data to the RAID Disc ... ref External links http www.disc group.com products bd series benefits DISC Archiving Systems BD ... HIE Electronics TBYTe Optical Data Storage Product http findarticles.com p articles mi m0FXG ..., Kodak and Elms mentioned References reflist DEFAULTSORT Optical Jukebox Category Optical computer ...   more details



  1. Optical recording

    Wilkinson and Ray Dakin founded Optical Disc Corporation now ODC Nimbus . Russell 1965 While working at Pacific Northwest National Laboratory, James Russell inventor James Russell invented an optical ... to center, with a laser that wrote the binary patterns. Russell s first optical disc was distinctly different from the eventual compact disc product the disc in the player was not read by laser light. A key characteristic of Russell s invention is that a laser is not used for the reading the disc, instead the entire disc or oblong sheet to be read is illuminated by a large playback light source ... 4,041,530 Video disc with phase structure, 1977. ref ref US patent 5,068,846 Reflective optical ... audio Category Digital media Category Optical disc authoring Category Sound recording technology ...The history of optical recording can be divided into a few number of distinct major contributions. The pioneers of optical recording worked mostly independently, and their solutions to the many technical challenges have very distinctive features, such as reflective disc Compaan and Kramer transparent disc Gregg floppy disc Russell rigid disc Compaan and Kramer focused laser beam for read out through transparent substrate Compaan and Kramer . Gregg 1958 Laserdisc technology, using a transparent disc ref US patent 3,430,966 Transparent recording disc, 1969. ref , was invented by David Paul Gregg ... US patent 4,893,297 Disc shaped member, 1990. ref . By 1969 Philips had developed a videodisc in reflective ... VCR and four years before the compact disc CD , which is based on Laserdisc technology. Philips ... web title Inventor of the Week Archive The Digital Compact Disc publisher Massachusetts Institute of Technology ... to optical photographic recording and playback system, March 1970. ref ref US patent 3,795,902 .... By 1985, Russell held over 25 patents to various technologies related to optical recording and playback. ref cite web title The Invention of Optical Digital Recording with James T. Russell publisher ...   more details



  1. Optical chopper

    context date May 2010 An optical chopper is a device which periodically interrupts a light beam. Three types are available variable frequency rotating disc choppers, fixed frequency tuning fork choppers, and optical shutter s. A rotating disc chopper was famously used in 1849 by Hippolyte Fizeau in the first non astronomical measurement of the speed of light . Examples Refimprove section date March 2012 Some early anti lock braking system s used a Wheel speed sensor Optical sensor wheel speed sensor with a rotating disc chopper. LCD television s use millions of LCD television Basic LCD concepts LCD shutters paired with red, green or blue filters to control the color of the pixel s on the screen. Late 20th century Mouse computing Mechanical mice opto mechanical computer mice used two chopper wheels for encoding. Movie cameras use an Shutter photography optical shutter to record individual frames of the movie. Movie projectors use an Movie projector Shutter optical shutter synchronized with the movie frames to produce the effect of Beta movement apparent motion on the movie screen. Liquid crystal shutter glasses are used in conjunction with a synchronized display screen to create the illusion of a three dimensional image. Light signals are sent at sea and at airports using a signal lamp with a hand operated shutter. Gallery title Examples of optical choppers in use lines 6 width 250 Image Absbrakes.jpg alt1 ABS brakes on a BMW motorcycle ABS brakes on a BMW motorcycle Image Seaman send Morse code signals.jpg alt2 US Navy sailor sending Morse code using a signal lamp US Navy sailor sending Morse code using a signal lamp. File Mouse mechanism diagram.svg alt3 cutaway view of a computer mouse with rotary optical encoders An opto mechanical mouse 1 moving the mouse turns the ball 2 X and Y rollers grip the ball and transfer movement, 3 Optical Rotary encoder Incremental rotary ... reflist Category Optical metrology tech stub Optics stub fa ...   more details



  1. Disc drive

    Disc Drive or Disc drive might refer to Disk storage Disk drive is a form of computer storage data storage for computer s DiscDrive was the afternoon show on CBC Radio 2 disambig ...   more details




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