Disc recording and/or reproducing apparatus with a liftable opti

Details Disc recording and/or reproducing apparatus with a liftable opti Disc recording and/or reproducing apparatus with a liftable opti

1997-07-16

1999-11-30

Neyzari, Ali

Dynamic information storage or retrieval

With stylus cleaning or treatment

369 72, G11B 358

Patent

active

059954671

ABSTRACT:
An optical disc recording and/or reproducing apparatus includes a carrier mechanism, an optical pickup apparatus, a shutter and a moving mechanism. The carrier mechanism carries a disc inside and outside the apparatus. The optical pickup apparatus radiates beams on a disc carried by the carrier mechanism. The optical pickup apparatus is provided with an objective lens. The shutter exposes or closes the upper surface of the objective lens. The shutter is provided to the optical pickup apparatus so that the shutter can be moved between a first position for exposing the upper surface of the objective lens and a second position for closing the upper surface of the objective lens. The moving mechanism moves the shutter between the first position and the second position according to recording and/or reproducing operation.

REFERENCES:
patent: 5172361 (1992-12-01), Urushibata et al.
patent: 5245601 (1993-09-01), Hake
patent: 5615196 (1997-03-01), Kato
Japio Abstract, Section P 865, JP 1-13235 (A), Published Jan. 18, 1989, Matsushita Electric Ind Co Ltd.
Japio Abstract, Section P 829, Acession No. 02638939, JP 63-255839, Published Oct. 24, 1988, Matsushita Graphic Commun Syst Inc.
Japio Abstract, Section P 778, Acession No. 02529335, JP 63-146235, Published Jun. 18, 1988, Canon Inc.
Japio Abstract, Section P 574, Acession No. 02065943, JP 61-280043, Published Dec. 10, 1986, Nec Eng Ltd.
Japio Abstract, Section P 551, Acession No. 02010051, JP 61-224151, Published Oct. 4, 1986, Canon Inc.
Japio Abstract, JP 56-22228 (A), Published Mar. 2, 1981, Matsushita Denki Sangyo K.K.
Patent Abstracts of Japan, vol. 13, No. 185 (P-865) (3533), JP 1-13235 (A), Published Jan. 18, 1989.

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