Image reading apparatus

Details Image reading apparatus Image reading apparatus

1997-04-11

1998-01-06

Le, Que

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250226, 358512, 348270, H01J 4014

Patent

active

057058067

ABSTRACT:
An image reading apparatus for reading documents disposed face upward on a document platen by optical scanning. The image reading apparatus comprises a color correction filter which has characteristics for shielding light of visible light range and is inserted into said imaging system on prescanning to detect the height of the document.

REFERENCES:
patent: 4891691 (1990-01-01), Baba
patent: 5010414 (1991-04-01), Clapp
patent: 5084611 (1992-01-01), Okisu et al.
patent: 5101266 (1992-03-01), Schlig et al.
patent: 5134439 (1992-07-01), Zuber
patent: 5355234 (1994-10-01), Kim

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