Optical bar code reader

Details Optical bar code reader Optical bar code reader

1977-10-11

1979-03-13

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

235472, 250566, G06K 710, G06K 714, G08C 906

Patent

active

041438094

ABSTRACT:
An optical bar code reader is provided employing a dual focusing system in which a source of light is focused by a first lens to a small area of the bar code, which reflects the light back through a second lens to a detector. In preferred embodiments of the invention the source and detector are solid state semiconductors mounted on the same substrate, while the focusing lenses are integrally molded as part of a single lens support. Spherical aberration is minimized by utilizing aspheric lenses.

REFERENCES:
patent: 2039406 (1936-05-01), Greensfelder
patent: 2325941 (1943-08-01), Dickinson
patent: 2983446 (1961-05-01), Zogg
patent: 3784832 (1974-01-01), Sewell
patent: 3809863 (1974-05-01), Oberg

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