Electro-optical bar-code scanning unit

Details Electro-optical bar-code scanning unit Electro-optical bar-code scanning unit

1975-10-24

1977-07-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235 6111E, 250235, G06K 710

Patent

active

040342301

ABSTRACT:
An electro-optical scanning unit adapted to sense a bar-code pattern and to generate digital signals corresponding thereto. In the unit, an incandescent light source acts to illuminate a narrow slit, and a reduced image thereof is optically projected to produce a luminous scanning line in a focal plane. An oscillating scanning mechanism interposed in the projection path causes the luminous line to sweep back and forth. The focal plane lies within a window formed in a channel dimensioned to receive an item bearing a bar-code pattern and to locate this pattern so that the bars lie in parallel relation to the luminous line, whereby when the line is swept across the pattern and is reflected thereby, the resultant light pulses are directed toward a photo-detector and converted to corresponding digital signals.

REFERENCES:
patent: 3662181 (1972-05-01), Hercher et al.
patent: 3758783 (1973-09-01), Sick et al.
patent: 3806706 (1974-04-01), Hasslinger et al.
patent: 3919527 (1975-11-01), Bowen et al.
patent: 3928759 (1975-12-01), Sansone

Affiliated with

Also associated with

Rating

Electro-optical bar-code scanning unit 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 bar-code scanning unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical bar-code scanning unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-579600