Rotary optical system for guiding and converging divided light b

Details Rotary optical system for guiding and converging divided light b Rotary optical system for guiding and converging divided light b

1995-12-27

1997-09-30

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4418, 369 4422, 369 97, 369 4437, G11B 709

Patent

active

056732457

ABSTRACT:
An optical pickup device includes: a stationary optical system for emitting a light beam and for producing a tracking error signal; and a rotary optical system rotatable around a rotary axis. The rotary optical system includes: a dividing unit for dividing the light beam emitted from the stationary optical system into a main beam and sub-beams; an objective lens for converging the main beam and the sub-beams on a recording surface of an optical tape and for receiving the main beam and the sub-beams reflected by the recording surface; and a guiding unit for guiding the main beam and the sub-beams to the objective lens and for guiding the main beam and the sub-beams reflected by the recording surface to the stationary optical system. The dividing unit, the objective lens and the guiding unit are arranged so as to be integrally rotated along with the rotary optical system, and the dividing unit is arranged on an optical path of the light beam between the stationary optical system and the objective lens.

REFERENCES:
patent: 4633455 (1986-12-01), Hudson
patent: 5153870 (1992-10-01), Lee et al.
patent: 5432763 (1995-07-01), Campbell et al.
patent: 5465241 (1995-11-01), Narahara
patent: 5471456 (1995-11-01), Tokumaru et al.
patent: 5513163 (1996-04-01), Kim
patent: 5548114 (1996-08-01), Van Rosmalten et al.

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