Optical pickup device

Details Optical pickup device Optical pickup device

1988-07-15

1990-01-09

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369122, G11B 700

Patent

active

048932965

ABSTRACT:
An optical pickup device having a semiconductor laser element mounted on a substrate, a photo detector formed on the substrate to receive a laser beam emitted from the semiconductor laser element and an optical element mounted on the substrate to cover the photo detector to branch the direction of optical path of the laser beam, the optical element having its face opposing the semiconductor laser element formed as an inclined face on which a semitransparent reflection film is deposited. The optical path branching optical element is provided with preventing means by which, of laser beams incident on the optical element, a laser beam reflected and/or scattered within the optical element is prevented from irradiating the photo detector.

REFERENCES:
patent: 4716559 (1987-12-01), Hine
patent: 4733065 (1988-03-01), Hoshi et al.
patent: 4823331 (1989-04-01), Yoshitoshi et al.

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