Bar code reader with closed-loop scan beam focusing

Details Bar code reader with closed-loop scan beam focusing Bar code reader with closed-loop scan beam focusing

1994-09-26

1995-12-05

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235467, G06K 710

Patent

active

054731500

ABSTRACT:
A bar code reader including automatic scan beam focusing based upon decoding performance is disclosed herein. The bar code reader includes a focusing lens which is movably supported along the light path of the scanning beam. An electric motor is coupled to the lens support to move the lens relative to the light beam source in response to control signals. The control signals are produced based upon the data error rate for the data produced by the decoding circuit of the reader from the signals produced by the photodetector therein. Based upon the data error rate, the electric motor is controlled to move the lens to focus the light beam and reduce or eliminate the data error.

REFERENCES:
patent: 4808804 (1989-02-01), Krichever et al.
patent: 5122644 (1992-01-01), Hasegawa
patent: 5124539 (1992-06-01), Krichever
patent: 5144122 (1992-09-01), Danley et al.

Affiliated with

Also associated with

Rating

Bar code reader with closed-loop scan beam focusing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bar code reader with closed-loop scan beam focusing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar code reader with closed-loop scan beam focusing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1375549