Optical pickup which includes a single objective lens having mag

Details Optical pickup which includes a single objective lens having mag Optical pickup which includes a single objective lens having mag

1988-01-19

1989-09-19

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, 369 45, 369118, 350448, 250201, G11B 700, G02B 900

Patent

active

048688215

ABSTRACT:
The movable range of an objective of an optical pickup device used in optical disc reproducing apparatus is increased and the size of the device is reduced by moving the objective solely or in combination with a collimating lens system in that range. The objective and collimating lens systems are integrated into a lens holder and located in the path of a diverging beam of a semiconductor laser.

REFERENCES:
patent: 4027952 (1977-06-01), Hughes
patent: 4333173 (1982-06-01), Yonezawa et al.
patent: 4354103 (1982-10-01), Immink et al.
patent: 4386823 (1983-06-01), Musha
patent: 4411500 (1983-10-01), Yonezawa et al.
patent: 4482986 (1984-11-01), Noda et al.
patent: 4708445 (1987-11-01), Goto
Video Disc & Optical Memory Systems: Isailovic; .COPYRGT.1985 Prentice-Hall; pp. 188-189.

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