Target finder in electro-optical scanners

Details Target finder in electro-optical scanners Target finder in electro-optical scanners

1995-05-22

1997-09-16

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235462, G06K 710

Patent

active

056683642

ABSTRACT:
A target bearing a coded indicium is found by a system for electro-optically reading indicia. Upon the determination that the indicium is located within a range of working distances relative to a hand-held housing, a user is prompted that the indicium is ready to be read. A sonic signal is transmitted by a ranger, and a return echo from the indicium is received. An auditory prompt, such as a single tone or a series of tones, advises the user that the indicium is within range.

REFERENCES:
patent: 4282425 (1981-08-01), Chadima
patent: 4758717 (1988-07-01), Shepard
patent: 4835374 (1989-05-01), Swartz
patent: 4877949 (1989-10-01), Danielson

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