Optical system for an information processing apparatus

Details Optical system for an information processing apparatus Optical system for an information processing apparatus

1990-12-20

1993-12-21

Chin, Tommy P.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4423, 369112, 369110, 359487, G11B 712

Patent

active

052726851

ABSTRACT:
In an optical system, a light beam reflected from an information recording medium is guided to a combination of first and second prisms. The first prism is made of optically anisotropic material and second prism is made of optically isotropic material. The light beam incident on the first prism is separated ordinary light rays and extraordinary light rays and the ordinary and extraordinary light rays are guided in different directions in the first and second prisms. Both of the ordinary and extraordinary light rays are detected so that information is reproduced in response to the light rays.

REFERENCES:
patent: 4659185 (1987-04-01), Aughton
patent: 4991937 (1991-02-01), Urino
patent: 5073879 (1991-12-01), Ando et al.
patent: 5077723 (1991-12-01), Yoshimatsu
patent: 5097463 (1992-03-01), Wagenblast et al.

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