Registers – Coded record sensors – Particular sensor structure
Patent
1996-05-14
1998-07-14
Pitts, Harold
Registers
Coded record sensors
Particular sensor structure
235455, G06K 710
Patent
active
057808341
ABSTRACT:
A low profile optical unit for use in a 2D bar code reader. A vertically disposed light redirecting panel having contoured reflective openings therein is mounted in the front of the unit and an LED behind the panel. Light emitting diodes for illuminating a target are mounted on the LED board behind the contour openings whereby direct light and reflected light illuminates a target. An imager housing is mounted on the back of the LED board and contains a recess that passes through the back of the housing and a lens barrel that extends forward through holes provided in the LED board and the light redirecting panel. An imager board is secured to the back of the housing which holds a 2D imager that is contained within the housing recess. Circuitry for generating image data signals is mounted on the back of the imager board. A lens holder is threadably mounted in the lens barrel which contains a lens system having a short back focal length for focusing a target image on the imager.
REFERENCES:
patent: 4488679 (1984-12-01), Bockholt
patent: 4570057 (1986-02-01), Chadima, Jr.
patent: 5331176 (1994-07-01), Sant' Anselmo
patent: 5378883 (1995-01-01), Batterman
patent: 5521366 (1996-05-01), Wang
patent: 5600116 (1997-02-01), Seo et al.
Hammond, Jr. Charles M.
Havens William H.
Hennick Robert J.
Hinkley Robert C.
Karpen Thomas W.
Pitts Harold
Welch Allyn Inc.
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