Oriented biological material for optical information storage and

Details Oriented biological material for optical information storage and Oriented biological material for optical information storage and

1992-11-30

1994-09-13

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Erasable imaging

430 21, 430139, 430495, 430945, 430962, 430321, 427162, G11B 700, G11B 726

Patent

active

053467892

ABSTRACT:
A stable, image-retaining, optically switchable film produced from a purple membrane in a high-pH polyvinyl alcohol solution forms an optical memory for data storage. The film, when dry, can be exposed to light to convert BR molecules to their M state, which is stable, and which allows long-term image storage. The image can be erased by exposing the film to yellow light to thereby switch all the molecules to the M state, and then a reverse image can be obtained using blue light. By controlling the location and wavelength of the incident light, pixels can be selected and exposed for information storage.

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