Optical pickup and hologram therefor

Details Optical pickup and hologram therefor Optical pickup and hologram therefor

1990-01-02

1991-05-21

Arnold, Bruce Y.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 37, 350252, 2502011, G02B 2610

Patent

active

050169548

ABSTRACT:
An optical pickup for picking up signals from an optical disk comprises a hologram to split a laser beam emitted from a laser light source into one 0th diffraction light beam and two 1st diffraction light beams, and also to diffract return light beams reflected from the optical disk with two grating areas formed on one surface thereof. The diffracted light beams from the hologram are detected by a 6-piece-divided photodetector. The number of parts included in the system has been greatly reduced.

REFERENCES:
patent: 3671106 (1972-06-01), Groh
patent: 4829506 (1989-05-01), Bressers et al.
"Formation of Optical Elements by Holography" by G. T. Sincerbox, IBM Tech. Discl. Bulletin, vol. 10, #3, Aug. 1967.

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