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3D optical data storage
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3D optical data storage is any form of optical data storage in which information can be recorded or read with three-dimensional resolution.
Examples of 3D optical data storage media. Top row – written Call/Recall media; Mempile media. Middle row – FMD; D-Data DMD and drive. Bottom row – La
Examples of 3D optical data storage media. Top row – written Call/Recall media; Mempile media. Middle row – FMD; D-Data DMD and drive. Bottom row – Landauer media; Microholas media in action.
Photochromism
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Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species (photoswitch) between two forms by the absorption of electromagnetic radiation (photoisomerization), where the two forms have different absorption spectra.
A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper.
A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper.
Hackmanite before (top) and after (bottom) exposure to UV
Hackmanite before (top) and after (bottom) exposure to UV