 Method for producing picture element groups by means of laser rays in space and on a plane |
| OF THE PREFERRED EMBODIMENTS The apparatus pursuant to FIG. 2 comprises a x-deflection mirror 3 ... |
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| Functional devices comprising a charge transfer complex layer |
| It is an object of the invention to provide a functional device which makes use of a charge ... |
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| Method of fabricating an electrolytic cell employing a solid polymer electrolyte |
| In accordance with the present invention, I have discovered that a working electrolytic cell can be ... |
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| Scanning module |
| It is an object of the present invention to provide a simple, miniature scanning module allowing ... |
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| Illumination device and method for laser projector |
| One or more of the problems outlined above may be solved by the various embodiments of the ... |
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| Air filter material |
| What is claimed is: 1. An air filter material comprising: (1) an upper fibrous layer to be disposed ... |
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| Wavelength allocation in a ring |
| It is an object of the present invention to provide a method of wavelength allocation that allows ... |
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| Ruggedized high-volume enviromentally-friendly electrophoretic cell |
| The invention, as claimed, is intended to provide a remedy. It solves the problem of how to ... |
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| Tape data carrier, method and device for manufacturing the same |
| The given problem is solved by the fact that the information carrier is a film structure which ... |
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Optical information storage on a bacteriorhodopsin - containing film
| Details |
Inventors: Lewis, Aaron; Chen, Zhongping; Takei, Hiroyuki;
Assignee: Cornell Research Foundation, Inc. (Ithaca, NY)
Primary Examiner: Bowers, Jr.; Charles L.
Assistant Examiner: McPherson; John A.
Attorney, Agent or Firm: Jones, Tullar & Cooper
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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DETAILED DESCRIPTION Accordingly, it is an object of the invention to provide an organic medium suitable for the processing and storage of optical information.
It is another object of the invention to provide an oriented medium with stabilized intermediate states for molecular information storage and processing.
It is a further object of the invention to provide a biological light-to-electrical signal transducer which is capable of performing optical and electro-optical processing at the sensor level.
It is another object of the invention to provide an organic medium capable of modulating the transmission of a light beam by the imposition of appropriate light and/or electric signals.
Another object of the invention is to provide an organic medium having an oriented molecular structure for use in storing (writing) optical and electro-optical data, the film being capable of retaining data while permitting nondestructive detection (reading) of such data, and being capable of reuse after optical erasure of data.
A still further object of the invention is the provision of a method for storing optical information in a biological medium.
Another object of invention is the provision of a method for nondestructively reading information stored in an optical memory system, both in a two-dimensional and in a three-dimensional medium.
It is a still further object of the invention to utilize the nonlinear properties of a biological medium- such as BR for optical information processing and storage.
Briefly, in one form of the invention a stable, image-retaining, optically switchable medium is provided for use in a wide range of applications as an optical memory.
The medium, in a preferred form of the invention, is a biological material having an oriented molecular structure, wherein all of the molecules are in the same direction or are in specified directions.
The material may be in the form of a thin film or membrane, which may be referred to as an essentially two-dimensional film, or may be in the form of a thick film which may be referred to as an essentially three-dimensional layer or block
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Optical Systems 
