Optical pickup device with wedge shaped and concave lens for cor

Details Optical pickup device with wedge shaped and concave lens for cor Optical pickup device with wedge shaped and concave lens for cor

1993-07-23

1996-03-05

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

369 4423, 359719, G02B 704

Patent

active

054969930

ABSTRACT:
Disclosed is an optical pickup device comprising a light source for irradiating a light beam onto an object from a light source, a half mirror for introducing said light beam reflected by the object to an optical detector; and a wedge-shaped photosensitive element, disposed between said half mirror and said optical detector, for cancelling out a coma produced by said half mirror.

REFERENCES:
patent: 4778984 (1988-10-01), Nakamura
patent: 4805992 (1989-02-01), Maeda
patent: 4886959 (1989-12-01), Hoshi et al.
patent: 4968874 (1990-11-01), Kasuga
patent: 5272685 (1993-12-01), Ando
patent: 5305074 (1994-04-01), Feldman

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