Apparatus for reproducing information from an optical disk

Details Apparatus for reproducing information from an optical disk Apparatus for reproducing information from an optical disk

1986-12-18

1988-03-22

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 55, 369 45, G03B 2752

Patent

active

047332778

ABSTRACT:
An optical unit for focusing light on an optical disk in which laser light from a semiconductor laser is passed through a parallelpiped having a diffracting grating on its incident side before being focused on the optical disk. The angle, contained in the plane of the semiconductor laser's junction, between the grating's normal and the optical axis of the laser light is adjusted to a predetermined value.

REFERENCES:
patent: 3833769 (1974-09-01), Compaan et al.
patent: 4525625 (1985-06-01), Abe
patent: 4633455 (1986-12-01), Hudson

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