Hand-mounted optical scanner system

Details Hand-mounted optical scanner system Hand-mounted optical scanner system

1993-05-07

1997-02-11

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710

Patent

active

056023766

ABSTRACT:
An optical scanner unit has a window which transmits light from inside the scanner to a target, for example, a bar code, and receives light from a target into the scanner. The window is tilted at Brewster's angle to permit light from inside the scanner to exit the scanner without "exit reflection" of light off the interior of the window. The window also permits light returned from the scanned target to enter the scanner and be sensed by a photodetector therein. The same window may be used for light transmitted to the photodetector and from the light source. The window is disposed at Brewster's angle relative to the scanning beam at the center of scan, and is close to Brewster's angle over the entire scan.

REFERENCES:
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patent: 4825057 (1989-04-01), Swartz
patent: 4955693 (1990-09-01), Bobba
patent: 4959810 (1990-09-01), Darbec
patent: 4963756 (1990-10-01), Quan et al.
patent: 5022034 (1991-06-01), May
patent: 5047617 (1991-09-01), Shepard
patent: 5250790 (1993-10-01), Metlitsky
patent: 5272324 (1993-12-01), Blevins
Joseph T. Verdeyen, Laser Electronics, Second Edition, published by Prentice Hall, Inc. (New Jersey), PP. 20-21.

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