Image reading apparatus utilizing a four step or more staircase

Details Image reading apparatus utilizing a four step or more staircase Image reading apparatus utilizing a four step or more staircase

1991-05-09

1993-01-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359565, H01J 4014

Patent

active

051773490

ABSTRACT:
An image reading apparatus comprises a plural-line sensor comprising a plurality of one-dimensional sensor arrays disposed on one and the same substrate, an imaging optical system for imaging an object on the sensor, and a brazed diffraction grating disposed in the optical path between the imaging optical system and the sensor for color-resolving a light beam from the object into a plurality of lights and directing the color-resolved lights to the sensor arrays corresponding thereto, the number of steps of the staircase structure of the diffraction grating being four or more.

REFERENCES:
patent: 4079411 (1978-03-01), Engelbrecht et al.
patent: 4277138 (1981-07-01), Dammann
patent: 4679901 (1987-07-01), Dammann et al.
patent: 4882619 (1989-11-01), Hasegawa et al.
patent: 4963464 (1990-10-01), Setani
patent: 4991030 (1991-02-01), Sato et al.
H. Dammann, Applied Optics, "Color Separation Gratings", vol. 17, No. 15, Aug. 1, 1978, pp. 2273-2279.

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