System and method for steering focal plane data using cylindrica

Details System and method for steering focal plane data using cylindrica System and method for steering focal plane data using cylindrica

1997-06-24

1998-11-10

Nelms, David C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4417, 369 4419, 369 4421, 359 11, 359 29, 359 32, 365216, 365125, G11B 700

Patent

active

058354700

ABSTRACT:
Systems and methods for steering a complex, spatially-modulated incident beam of coherent light 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 the incident beam, (2) a rotational steering mechanism, coupled to the reflective element, that orients the reflective element according to a desired rotational angle 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 and rotatable about an axis of a plane thereof to receive the beam at a location thereon that is a function of the desired direction and an angular position of the HMC.

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

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