Effect Of Birefringence On Optical Memory Systems

1987 ◽  
Author(s):  
David Treves ◽  
Dan S. Bloomberg
Keyword(s):  
Optical Memory ◽  
Memory Systems

The Birth of ECD: An Invention Factory (1965–1979)

2018 ◽  
pp. 123-146
Author(s):  
Lillian Hoddeson ◽  
Peter Garrett
Keyword(s):  
Thin Film ◽  
Phase Change Memory ◽  
Optical Memory ◽  
Memory Systems ◽  
Scientific Field ◽  
Practical Applications ◽  
Materials Research ◽  
Energy Conversion Devices ◽  
Development Laboratory ◽  
Change Memory

With new resources gained from licensing Ovshinsky’s discoveries, his company, renamed Energy Conversion Devices (ECD), expanded into an ambitious research and development laboratory. Its growing staff of highly trained scientists pursued both theoretical explanations and practical applications of the Ovshinsky effect, in the process helping to open the vast scientific field of materials research. Their first success was the optical phase-change memory that became the basis of rewritable CDs and DVDs. The new companies that ECD established circa 1970 to commercialize instant imaging and optical memory systems based on Ovshinsky’s new “Ovonic” proprietary materials did not succeed, however, and ECD struggled to survive. Its fortunes dramatically improved a decade later when its new photovoltaic program, aimed at developing and producing thin-film amorphous silicon solar cells in large quantities attracted major funding from the prominent oil corporation Atlantic Richfield (ARCO).

scholarly journals INFORMATION REPRODUCTION SYSTEMS IN INFORMATION BUSINESS LOGISTICS

2021 ◽  
pp. 56-65
Author(s):  
Volontyr Lyudmyla
Keyword(s):  
Information System ◽  
Information Technologies ◽  
Modular Design ◽  
Optical Memory ◽  
Electric Circuit ◽  
Memory Systems ◽  
Information Support ◽  
Optical Systems ◽  
Video Information ◽  
The Creation

The article considers the fundamentals of the information reproduction systems formation in the optoelectronic element base for information logistics systems. The use of optoelectronic elements for information processing has been considered, namely discrete optoelectronic digital systems, analog systems, optical memory systems, optical systems of input-output of information in computers, systems based on fiber devices of neuristor type. It is emphasized that modern logistics is impossible without the active use of information technology. The functions of information support of managerial influences can be performed by information technologies used today in logistics. To perform the tasks of financial flow management, these technologies can be supplemented by modules of eye-processing of the information. Logic-clock quantron automatic devices based on optocouplers are suitable for creating parallel information operating environments, which is a universal means of converting and presenting information. This approach leads to the creation of matrix-type devices that are able not only to receive information but also to process it. One of the promising areas of use of optoelectronic matrix systems is the creation of flat operating screens for parallel reception and display of information. The paper presents the classification of operating screens according to such features as: the principle of displaying information, the type of input information, the type of output information, the method of image formation, the number of consumers of the information. The analysis of electric circuit diagram of modern LED matrix video screens, in particular of a typesetting-modular design has been presented. A comparison of the forms of organization of matrix video screens is made, and it is emphasized that the most economical in terms of the number of memory trigger elements per one LED of the display cell is a video information system based on the structure of the third group video screen. The structure of the video information system is optimized according to the criterion of optimality – the maximum image quality on the matrix screen and the minimum screen complexity, which is determined by the circuit features of the microelectronic circuits.

Optical memory systems with associative-address access

1980 ◽  
Vol 10 (8) ◽  
pp. 1020-1024 ◽  
Author(s):  
A A Verbovetskiĭ ◽  
V B Fedorov
Keyword(s):  
Optical Memory ◽  
Memory Systems

Videodisc and optical memory systems

1986 ◽  
Vol 18 (5) ◽  
pp. 273-274
Author(s):  
R.S. Adrain
Keyword(s):  
Optical Memory ◽  
Memory Systems

APPLICATIONS OF PHOTOREFRACTIVE VOLUME HOLOGRAPHY IN OPTICAL COMPUTING

1994 ◽  
Vol 03 (03) ◽  
pp. 317-337 ◽  
Author(s):  
C. GU ◽  
P. YEH
Keyword(s):  
Dynamic Range ◽  
Optical Memory ◽  
Optical Computing ◽  
Logic Gates ◽  
Memory Systems ◽  
Optical Storage ◽  
Laser Source ◽  
3 Dimensional ◽  
Half Adder ◽  
Volume Holography

After a brief review of the photorefractive effect, we describe three examples of the applications in optical computing using photorefractive volume holography. These are 3-dimensional optical storage, parallel optical matrix processor, and multiwavelength optical half-adder. For the 3-dimensional optical storage, we consider some fundamental issues in photorefractive memory, including the storage capacity and the dynamic range. We also discuss the photorefractive noise gratings formed during a multiple exposure schedule. These fundamental issues in photorefractive storage are important in understanding the potentials and limitations of optical memory systems. For parallel optical matrix processing, we propose and demonstrate a novel method of matrix-matrix application using grating degeneracy in photorefractive media in conjunction with incoherent laser source arrays. For multiwavelength optical half-adder, we describe photorefractive logic gates and their application in the summation of binary numbers.

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