Optical image sensor

Details Optical image sensor Optical image sensor

1995-11-03

1998-01-20

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235462, G06K 710

Patent

active

057104182

ABSTRACT:
An optical image sensor, particularly a bar code reader, comprises a laser diode emitting a light beam of small area and elliptical cross-section. The light beam is directed onto an optical device for greatly expanding the beam along one axis for expanding the beam cross-section to that of a greatly elongated rectangle having a line-like shape. The line beam is projected from the reader for encompassing and illuminating the entire width of a bar code. Light reflected from the bar code is focused as a complete image of the bar code onto a light detector for simultaneous storage of all the bar code data. The beam expander can comprise a cylindrical lens, a cylindrical mirror, or a conical mirror including means for varying the intercept of the laser beam with the conical surface for selectively varying the width of the expanded beam.

REFERENCES:
patent: 4262208 (1981-04-01), Suzki et al.
patent: 5227910 (1993-07-01), Khattak
patent: 5350909 (1994-09-01), Powell et al.

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