Laser recordable discs, also known as optical discs, are a type of storage medium used to store digital data. They are typically made of polycarbonate plastic and are coated with a thin layer of metal, usually aluminum, which is then covered with a protective layer of lacquer. The discs are designed to be read and written to using a laser beam, which can either burn or etch data onto the surface of the disc. There are several types of laser recordable discs, each with its own advantages and disadvantages. The most common types are CD-R, DVD-R, and Blu-ray Discs. CD-Rs can store up to 700 MB of data, while DVD-Rs can store up to 4.7 GB and Blu-ray Discs can store up to 25 GB (or 50 GB for dual-layer discs). To write data onto a laser recordable disc, a laser beam is used to heat the surface of the disc, causing tiny pits to be formed in the metal layer. These pits represent the digital data and can be read back by a laser beam that is reflected off the surface of the disc. The laser beam is focused onto the surface of the disc by a lens, which moves back and forth along a track on the disc to access different areas of data. Laser recordable discs are widely used for storing digital media such as music, movies, and computer software. They are also used for archiving data and for creating backup copies of important files. However, they are not as durable as other types of storage media and can be easily damaged by scratches or exposure to sunlight.
optical discs, laser beam, data storage, CD-R, DVD-R, Blu-ray Discs
CITATION : "Matthew Baker. 'Laser Recordable Discs.' Design+Encyclopedia. https://design-encyclopedia.com/?E=361144 (Accessed on June 07, 2025)"
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