Document processor with optical sensor arrangement

Details Document processor with optical sensor arrangement Document processor with optical sensor arrangement

2007-09-25

2007-09-25

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S216000, C250S573000

Reexamination Certificate

active

11302806

ABSTRACT:
An apparatus for document processing comprises an optical sensor including a light source, a light detector and an optical element. The optical sensor is adapted so that, during operation of the apparatus, at least a first portion of light from the source that enters the optical element travels along paths in the optical element so as to be re-directed by total internal reflection toward the detector and wherein the total internal reflection is maintained when the optical element is wet. Signals form the optical sensor may be used to determine, for example, the state of a document storage cassette or the location of a document with respect to the cassette.

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patent: 5442435 (1995-08-01), Cooper et al.
patent: 5616915 (1997-04-01), Simpkins et al.
patent: 5988345 (1999-11-01), Bergeron et al.
patent: 5997121 (1999-12-01), Altfather et al.
patent: 6441891 (2002-08-01), Levasseur et al.
patent: 2003/0081197 (2003-05-01), Zoladz, Jr. et al.

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