Compact disc surface

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Compact disc surface

Compact disc surface. Coloured scanning electron micrograph (SEM) of the surface of an audio compact disc exposed to show the musical layer below. The plastic disc is pressed with a series of fine depressions representing a digitised musical signal capable of being read by a laser. To reflect the laser light, the music layer is coated with a fine film of metal which follows the depressions exactly. This layer is covered by another layer of transparent plastic (upper right). The music is sandwiched between two layers of plastic which prevents dust and scratches from affecting the sound. Magnification: x3, 450 at 5x7cm size

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 9308015

© POWER AND SYRED/SCIENCE PHOTO LIBRARY

Audio Audio Sound Communication Communications Compact Disc Disk Music Pattern Repeated Sound Surface Depressions

EDITORS COMMENTS
This print showcases the intricate surface of a compact disc in stunning detail. Through a coloured scanning electron micrograph (SEM), we are able to observe the complex layers that make up this technological marvel. The plastic disc is imprinted with a series of finely crafted depressions, representing a digitized musical signal that can be read by a laser. To enhance reflectivity and ensure accurate playback, the music layer is coated with an ultra-thin film of metal which precisely follows the depressions on the disc's surface. This layer is then protected by another transparent plastic layer, visible in the upper right corner of the image. By sandwiching the music between two layers of plastic, dust and scratches are effectively prevented from interfering with sound quality. The magnification level used for this photograph allows us to appreciate every minute detail at x3,450 times its original size when printed as 5x7cm. It serves as a reminder of how advanced technology has become in enabling us to enjoy high-quality audio experiences through such compact mediums. This mesmerizing image not only highlights advancements in communication and audio technologies but also emphasizes the meticulous craftsmanship involved in producing these ubiquitous discs that have revolutionized our listening habits over time.

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