DVD data layers, SEM

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DVD data layers, SEM

DVD layers. Coloured scanning electron micrograph (SEM) of the pitted layers that encode information on a DVD (digital versatile disc). The pits are read by a focused laser as the disc rotates. This is a double-layer DVD, which can hold up to 8.5 gigabytes (GB) of information. One layer (gold) is semi-transparent. A second layer (silver) is bonded to the gold layer by a clear adhesive layer (grey). After the laser has read the information on the gold layer (from the centre of the disc outwards), the laser refocuses itself on the silver layer and reads from that, from the outer edge inwards. Magnification: x700 at 6x7cm size

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

Media ID 9308827

© POWER AND SYRED/SCIENCE PHOTO LIBRARY

Adhesive Audio Digital Versatile Disc Disk Double Film Gold Laser Layer Layers Media Medium Optical Pits Silver Sound Surface Surfaces Video

EDITORS COMMENTS
This print showcases the intricate layers of a DVD, revealing the hidden technology behind our favorite movies and music. In this colored scanning electron micrograph (SEM), we are granted a microscopic view of the pitted surfaces that encode information on a digital versatile disc. As the disc rotates, a focused laser skillfully reads these minuscule pits, allowing us to enjoy seamless audio and video playback. This particular DVD is no ordinary one; it is a double-layer marvel capable of storing an impressive 8.5 gigabytes (GB) of data. The first layer, adorned in gold hues, possesses semi-transparency while being sandwiched with precision by a clear adhesive layer. Bonded to this golden layer lies another silver layer eagerly waiting its turn to be read by the laser's watchful eye. With magnification at x700 and measuring 6x7cm in size, this SEM image reveals the complexity within such small dimensions. It serves as a reminder that even seemingly simple forms of media like DVDs rely on advanced technology for their functionality. Science Photo Library has once again captured an awe-inspiring moment through their lens, shedding light on the remarkable world hidden beneath our fingertips.

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