What is an optical record?
Optical Recording is a method of data recording, audio content, or video content in a form that plays back using light. This is usually done with the disc as a storage medium. The main advantage of the optical record is that there is less physical contact with the surface storage surface than with other forms of recording, theoretically gives it a longer life. For example, in a sound recording, it replaced the compact disk audio cartridge. When recording the DVD video, she replaced a video tape. In storing computer data CDs and DVDs, they replaced the audio cassette and floppy disk. This binary code is then stored in physical form on the disk. On pre -recorded discs, there is a piece of data that is represented as 1 in binary, stored by pressing the pit in the disk. Piece data, which is represented as 0 in a binary place, is stored by leaving the surface flat.
The data is then read by a disc, as it spins around when the laser lights up to the surface. CAS that requires to bounce light will vary depending on whether the surface is flat or built. This system is the reason why the optical record is usually stored on the disk: This is by its very nature the most effective shape for the object that is turned.
Unlike general beliefs, the data is physically stored on the top of the disk, a party with a printed label. The data is located immediately below this label. The underside of the disc, which is a glossy side, is only a transparent layer that protects the surface surface from the contaminated.
Each type of optical disks is available in three formats. Reading discs come with pre -recorded data. Recordable discs do not have pits and flat sections, but rather use a dye that can be produced either reflective or non -reflective to create the same effect. Rewritable discs use a metal compound that can be repeatedly heated and melted to create different combinations of pits and flat surfaces.
exIt will inspire several potential disadvantages of optical record. One of them is that the protective dye on the discs can fade, wipe part or all data. This can happen at extreme temperatures or because the dye was of low quality. Another problem is that scratches or stains can prevent the laser from reading data. How serious the damage is to determine whether it is reversible.