Illumination system with white level calibration for hand-held s

Details Illumination system with white level calibration for hand-held s Illumination system with white level calibration for hand-held s

1997-06-18

1999-11-30

Lee, Thomas D.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358475, H04N 140

Patent

active

059952431

ABSTRACT:
An illumination system for illuminating a scan region on an object and for providing a white level reference for a detector may comprise a light source for producing light rays and an elongate lens having a first end and a second end positioned between the light source and the scan region. The lens collects some of the light rays from the light source and directs them onto the scan region. A first spot lens is positioned adjacent the first end of the elongate lens and a second spot lens is positioned adjacent the second end of the elongate lens. The first and second spot lenses direct some of the light rays from the light source toward first and second ends of the scan line. A white level reference mark is positioned adjacent the lens and the light source so that some of the light rays from the light source are reflected by the white level reference mark to the detector.

REFERENCES:
patent: 3911213 (1975-10-01), Tregay et al.
patent: 4703186 (1987-10-01), Nakayama et al.
patent: 4709144 (1987-11-01), Vincent
patent: 4819083 (1989-04-01), Kawai et al.
patent: 4870268 (1989-09-01), Vincent et al.
patent: 4894523 (1990-01-01), Chadima, Jr. et al.
patent: 4899228 (1990-02-01), Sano et al.
patent: 4926041 (1990-05-01), Boyd
patent: 4967188 (1990-10-01), Collins, Jr.
patent: 4969054 (1990-11-01), Tsuji et al.
patent: 5019703 (1991-05-01), Boyd et al.
patent: 5032004 (1991-07-01), Steinle
patent: 5038028 (1991-08-01), Boyd et al.
patent: 5040872 (1991-08-01), Steinle
patent: 5044727 (1991-09-01), Steinle
patent: 5182450 (1993-01-01), Pan
patent: 5227620 (1993-07-01), Elder, Jr. et al.
patent: 5278674 (1994-01-01), Webb et al.
patent: 5301243 (1994-04-01), Olschafskie et al.
patent: 5306908 (1994-04-01), McConica et al.
patent: 5381020 (1995-01-01), Kochis et al.
patent: 5410347 (1995-04-01), Steinle et al.
patent: 5434680 (1995-07-01), Noda et al.
patent: 5552597 (1996-09-01), McConica
patent: 5586212 (1996-12-01), McConica
Modern Optical Engineering, The Design of Optical Systems-Second Edition, Warren J. Smith pp. 436-453, Copyright 1990 by McGraw-Hill, Inc.
Document No. vol. 12No. 256, Jul. 19, 1988, Mitsubishi Electric.
Document No. vol. 17No. 152, Mar. 25, 1993, Canon, Inc. Japan.
Document No. 08/601,276, Jan. 29, 1996, Kerscher et al.
Document No. 08/592,904, Jan. 29, 1996, Kerscher et al.

Affiliated with

Also associated with

Rating

Illumination system with white level calibration for hand-held s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illumination system with white level calibration for hand-held s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illumination system with white level calibration for hand-held s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1680235