Optical pickup and optical recording medium reproducing apparatu

Details Optical pickup and optical recording medium reproducing apparatu Optical pickup and optical recording medium reproducing apparatu

1996-02-27

1998-03-24

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, G11B 700

Patent

active

057320608

ABSTRACT:
An optical pickup and an optical recording medium reproducing apparatus smaller and more reliable than conventional optical pickups and optical recording medium reproducing apparatuses. These are provided with a one-dimensional metal grid which is formed so that the ratio h/d that the pitch "d" and the thickness of metal conductors "h" constituting the wire grid is about 0.1 or more, and also a group of light receiving units which receive light beams split by the one-dimensional metal grid.

REFERENCES:
patent: 3436143 (1969-04-01), Garrett
patent: 4794585 (1988-12-01), Lee
patent: 4823331 (1989-04-01), Yoshitoshi et al.
patent: 4918675 (1990-04-01), Lee
patent: 5124868 (1992-06-01), Matsubayashi et al.
Lochbihler, Hans and Predehl, Peter, "Characterization of X-Ray Transmission Gratings", Applied Optics, vol. 31, No. 7, Mar. 1, 1992.

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