Optical signal reading device

Details Optical signal reading device Optical signal reading device

1983-10-04

1988-03-15

Corbin, John K.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250201, 369 44, G02B 2714, G01J 120, G11B 700

Patent

active

047308990

ABSTRACT:
An optical signal reading device comprising a laser light source (101), an objective (107) slidable in the direction of the optical axis which is at right angles to the disc surface of a disc-like record carrier, a light detector (110) for receiving the reflected light coming from the disc surface via the objective, and a beam splitter (104) comprised of a single optical part disposed between the light source (101), light detector (110), and objective (107). The splitter has a pair of reflecting surfaces disposed approximately parallel to each other to ensure that the incident light from the light source (101) and the reflected light guided to the light detector (110) are parallel and opposite to each other.

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patent: 4505584 (1985-03-01), Kato et al.
patent: 4507766 (1985-03-01), Saimi et al.
patent: 4564931 (1986-01-01), O'Hora et al.

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