Image reading apparatus

Details Image reading apparatus Image reading apparatus

1992-04-06

1994-02-01

Arnold, Bruce Y.

Optical: systems and elements

Miscellaneous

355 55, 382 65, G02B 2602

Patent

active

052836983

ABSTRACT:
There is disclosed an image reading apparatus in which the scanning optical system having a slit is caused to scan in a short-side direction of the slit, and light passed through the slit and reflected from or transmitted through an original is guided to a solid-state image pickup element through an optical image forming element so that the image is formed on the solid-state image pickup element and is read. In the apparatus, opening portions for detecting a shift in relative positional relationship between the slit and the solid-state image pickup element are formed in both end portions of the slit in its longitudinal direction corresponding to a portion other than an effective image region of the solid-state image pickup element.

REFERENCES:
patent: 4653904 (1987-03-01), Imamura
patent: 5060283 (1991-10-01), Shiraishi
patent: 5173599 (1992-12-01), Setani

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