Optical scanning device

Details Optical scanning device Optical scanning device

1995-02-21

1997-04-08

Dzierzynski, Paul M.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 17, 359209, 347260, G02B 532, G02B 2608

Patent

active

056193505

ABSTRACT:
An optical scanning device including a semiconductor laser and a scanning optical system which transmits a laser beam emitted from the semiconductor laser and scans the laser beam on a photosensitive drum. The scanning optical system includes at least one hologram having relief on at least one surface with the ratio h/P of the depth h and the minimum pitch P of the relief being set to about 1 or less in an area of the hologram surface the laser beam irradiates.

REFERENCES:
patent: 4747646 (1988-05-01), Andrews
patent: 5182659 (1993-01-01), Clay et al.
patent: 5238785 (1993-08-01), Ohkura et al.
patent: 5253087 (1993-10-01), Yang
patent: 5295004 (1994-03-01), Hasegawa
patent: 5363238 (1994-11-01), Akune et al.
Yamagishi et al., "Holographic Straight Line Scanner for Laser Prints", Dec. 1986, pp. 416-426.
Hasegawa et al., "Straight-line scanning analysis of an all holographic scanner", Dec. 1989, pp. 5317-5325, vol. 28, No. 24.

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