Optical system for code symbol scanners

Details Optical system for code symbol scanners Optical system for code symbol scanners

1975-10-06

1977-05-24

Kilgore, Robert M.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

250566, 3401463Z, 350 7, G06K 714, G06K 912, G02B 2717

Patent

active

040257614

ABSTRACT:
A laser scanner is disclosed which is especially adapted as a label reader for point-of-sale data processingsystems. The scanner produces a polyphase scan pattern. The scanning beam is vertically deflected as a sinuosoidal function of time by an oscillatory mirror and is horizontally deflected as a sawtooth function of time by a rotary multifaceted mirror. The return light signal follows an optical path including the rotary multifaceted mirror which causes "derotation" of the image before it impinges upon the receiving photodetector. Additionally, the ambient or background light is reduced by providing an optical slit in the receiving optics so that the vertical deflection is accommodated.

REFERENCES:
patent: 3360659 (1967-12-01), Young
patent: 3744026 (1973-07-01), Wolff
patent: 3754212 (1973-08-01), Borsboom
patent: 3758783 (1973-09-01), Sick
patent: 3762791 (1973-10-01), Fournier
patent: 3916158 (1975-10-01), Sansone
patent: 3919527 (1975-11-01), Bowen

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