System and method for precessing an optical path using cylindric

Details System and method for precessing an optical path using cylindric System and method for precessing an optical path using cylindric

1997-06-24

1998-10-13

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Optical

365125, 359 32, 359 29, G11C 1304

Patent

active

058222634

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 reflective element, locatable proximate a first focal plane of a complex, spatially-modulated incident beam of light, (2) a polar steering mechanism, coupled to the reflective element, that orients the reflective element according to desired tilt and precession angles to steer the incident beam in a desired direction and (3) a refractive element that refracts the beam reflected from the reflective element to create a second focal plane for the beam, the HMC locatable proximate the second focal plane to receive the beam at a location thereon that is a function of the desired direction.

REFERENCES:
patent: 4432071 (1984-02-01), Szabo

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