Molded block optical system for volume holographic storage

Details Molded block optical system for volume holographic storage Molded block optical system for volume holographic storage

1994-11-09

1999-04-20

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 11, 359833, 359384, 359598, 365125, G03H 100, G03H 112, G02B 504, G11C 1304

Patent

active

058962107

ABSTRACT:
Molded block optics system (10) writes and reads data from an optical storage medium and includes first molded optics block (12) for receiving reference beam (60) and original object beam (46) that contains a predetermined data set. First molded optics block (12) includes reflective surfaces (18, 20, 22, and 24) and spatial light modulator (50). Reflective surfaces (18, 20, and 24) include reference beam surfaces (24) and object beam surfaces (18, 20, and 22). Reference beam surfaces (24) direct reference beam (60) to optical storage medium (16) at predetermined location (54). Spatial light modulator (50) modulates object beam (46) and directs modulated object beam (46) to predetermined location (54). Reference beam (60) and object beam (46) form an interference pattern that writes data on optical storage medium (16). First molded optics block (12) also directs reference beam (60) to optical storage medium (16) for generating reconstructed object beam (64). Second molded optics block (14) receives reconstructed object beam (64), and includes reflective surfaces that direct reconstructed object beam (64) to detector array (32).

REFERENCES:
patent: 3990771 (1976-11-01), Hundelshausen et al.
patent: 4120569 (1978-10-01), Richards
patent: 4597630 (1986-07-01), Brandstetter et al.
patent: 5235439 (1993-08-01), Stoll
patent: 5436867 (1995-07-01), Mok
Steve Redfield and Lambertus Hesselink, "Data Storage in Photorefractives Revisited," SPIE vol. 963 Optical Computing 88 (1988), pp. 35-45.
Steve Redfield and Jerry Willenbring, "Holostore Technology for Higher Levels of Memory Hierarchy," Microelectronics and Computer Technology Corporation, (MCC), Austin, Texas, pp. 1-5, Rev. Jun. 11, 1991.

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