Optical information recording and/or reproducing apparatus

Details Optical information recording and/or reproducing apparatus Optical information recording and/or reproducing apparatus

1997-06-12

1998-06-23

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, 369110, G11B 700

Patent

active

057712190

ABSTRACT:
An optical information recording and/or reproducing apparatus includes a stationary portion and a movable portion. The stationary portion has an irradiation optical system for emitting a beam for recording information in an optical information recording medium and/or reproducing recorded information, and a detection optical system for detecting a beam from the recording medium. The movable portion is movable relative to the stationary portion and has an objective lens. The movable portion has a first optical path for irradiating the beam from the irradiation optical system onto the recording medium and a second optical path for guiding the beam from the recording medium to the detection optical system. The first optical path and the second optical path are formed as partly different paths. A beam separator for separating the beam from the irradiation optical system into a plurality of beams is set in the specific path only for the first optical system.

REFERENCES:
patent: 5070494 (1991-12-01), Emoto et al.
patent: 5101389 (1992-03-01), Ohuchida et al.
patent: 5313441 (1994-05-01), Imai et al.

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