Electro-optical document reader

Facsimile and static presentation processing – Facsimile – Recording apparatus

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

358200, 358225, 358901, H04N 110

Patent

active

042209781

ABSTRACT:
The disclosure is of apparatus including a duct-like light guide having an inlet end and an outlet end, light source means at the inlet end, a document at the outlet end, an optical reading system for receiving light reflected from the document, and electronic circuit means for converting the reflected light to electrical signals. Typically, the optical reading system has non-uniform light transmission characteristics, and, with one type of lens system, there is fall-off in intensity at the ends of the system. To compensate for this fall-off, the light source means is designed and positioned to provide a corresponding non-uniform light distribution so that the net effect is a uniform light distribution at the output of the lens system.

REFERENCES:
patent: 3183815 (1965-05-01), Kapany et al.
patent: 3278681 (1966-10-01), Larue, Jr.
patent: 3317738 (1967-05-01), Piepenbrink et al.
patent: 3430057 (1969-02-01), Genahr
patent: 3623810 (1971-11-01), Ogawa et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Electro-optical document reader does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electro-optical document reader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical document reader will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1711588

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.