System and method for steering fresnel region data to access dat

Details System and method for steering fresnel region data to access dat System and method for steering fresnel region data to access dat

1997-06-24

1999-01-12

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Optical

365125, 359 11, 359 29, 359 32, G11C 1304

Patent

active

058598081

ABSTRACT:
Systems and methods for steering an optical path to gain access to data locations in a holographic memory cell (HMC). One of the systems includes: (1) a refractive element that receives a complex, spatially-modulated incident beam of light, (2) first and second reflective elements locatable to receive and reflect the incident beam in a Fresnel region thereof and (3) a reflective element steering mechanism, coupled to the first and second reflective elements, that moves the first and second reflective elements in tandem to steer the incident beam with respect to the HMC thereby to cause the incident beam to illuminate a location on the HMC that is a function of a movement of the first and second reflective elements.

REFERENCES:
patent: 4550395 (1985-10-01), Carlson
patent: 5481523 (1996-01-01), Dewald

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