Bar-code optical scanner

Details Bar-code optical scanner Bar-code optical scanner

1996-08-27

1998-03-31

Pitts, Harold

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250566, 235472, B29D 1318

Patent

active

057341575

ABSTRACT:
A bar-code optical scanner in which a converging prism is disposed in front of the light source to concentrate emitted light into a light beam, permitting it to be projected onto the bar code; the lens which is disposed between the reflector and the photosensor has a rectangular through hole forming a diaphragm, the long side of the through hole being disposed in parallel to the transversely disposed charge coupled device of the photosensor, the diameter of the through hole gradually reducing from the side of the photosensor toward the side of the reflector to match with the light path of reflected light passing therethrough; a converging meniscus lens is disposed in front of the photosensor to concentrate reflected light from the lens into the charge coupled device of the photosensor.

REFERENCES:
patent: 4786798 (1988-11-01), Lowsdach

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