Optical head, optical component for use therein, method of manuf

Details Optical head, optical component for use therein, method of manuf Optical head, optical component for use therein, method of manuf

1997-10-29

2000-12-19

Mack, Ricky

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

G02B 2714

Patent

active

061634093

ABSTRACT:
An optical head comprising two light sources, a beam splitter, and two photodetectors. The first light source emits a first light beam to be applied to the recording surface of a first-type optical disk. The second light source emits a second light beam to be applied to the recording surface of a second-type optical disk. The first light beam and the second light beam intersect with each other at an angle other than 90.degree.. The beam splitter is provided at the intersection of the first and second light beams. The beam splitter guides both light beams in a common optical path which extends to the recording surface of either optical disk. The beam splitter guides the first light beam reflected from the first-type optical disk toward the first light source, and the second light beam reflected from the second-type optical disk toward the second light source. The first photodetector detests the first beam reflected from the first-type optical disk. The second photodetector detests the second beam reflected from the second-type optical disk.

REFERENCES:
patent: 5513164 (1996-04-01), Tanaka et al.
patent: 5615200 (1997-03-01), Hoshino et al.
patent: 5661711 (1997-08-01), Tanaka et al.

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