Color image reader

Details Color image reader Color image reader

1993-11-12

1996-01-02

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

250226, 359 22, 359 24, 359590, G02B 528, G02B 532, G03H 126, G01J 350

Patent

active

054813832

ABSTRACT:
A color image reading apparatus includes a multiple-line sensor in which a plurality of one-dimensional sensor arrays are arranged on a single substrate, a projection optical system for projecting a subject on the sensor, and a color separator disposed in an optical path between the projection optical system and the sensor, for color-separating light from the subject into a plurality of color beams. The color separator includes a volume hologram and an optical interference film.

REFERENCES:
patent: 3681519 (1972-08-01), Larsen et al.
patent: 4882619 (1989-11-01), Hasegawa et al.
patent: 5011244 (1991-04-01), Smith et al.
patent: 5026131 (1991-06-01), Jannson et al.
patent: 5267060 (1993-11-01), Colton
patent: 5272551 (1993-12-01), Lehoreau et al.
The Bell System Technical Journal "Coupled Wave Theory For Thick Hologram Gratings" H. Kogelnik, vol. 48, No. 9, Nov. 1969, pp. 2909-2947.

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