Document illumination with Lambertian cavity

Details Document illumination with Lambertian cavity Document illumination with Lambertian cavity

1993-12-22

1996-02-13

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055901, 356236, G01J 100

Patent

active

054913365

ABSTRACT:
An arrangement for illuminating documents in a document-processing system wherein a large number of documents are rapidly and continuously transported past one or more imaging stations, each station having, for illumination, an integrating structure which houses one or more cylindrical, integrating Lambertian reflecting/diffusing cavities, each cavity having one or more like light sources, so that each cavity generates and projects a highly intense, highly uniform and highly diffuse beam of illumination, while incorporating imaging camera means and optical guide means to couple the illumination beam to the face of the documents at the imaging station and to couple the image of the document to the imaging camera.

REFERENCES:
patent: 4660984 (1987-04-01), MacDonald
patent: 4868383 (1989-09-01), Kurtz et al.
patent: 4900923 (1990-02-01), Gerlinger
patent: 5103385 (1992-04-01), Federico et al.
patent: 5215370 (1993-01-01), Kaplan
patent: 5241459 (1993-08-01), Kaplan et al.
patent: 5268749 (1993-12-01), Weber

Affiliated with

Also associated with

Rating

Document illumination with Lambertian cavity does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Document illumination with Lambertian cavity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Document illumination with Lambertian cavity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-242334