Hand-held optical code reader

Details Hand-held optical code reader Hand-held optical code reader

1995-12-19

1997-12-30

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235462, G06K 710

Patent

active

057033480

ABSTRACT:
An optical code reader has of a reading window, a guide light source for guiding a two-dimensional code into a reading range outside the read window, an illumination light source for illuminating the two-dimensional code guided into the reading range, an optical system for focusing light reflected from the two-dimensional code illuminated by the illumination light source to form an image, an image sensor for sensing the image formed by the optical system, a read control circuit for reading the two-dimensional code on the basis of the sensed image, and a hand-held frame, having an opening which serves as the read window. The hand-held frame holds the guide light source, illumination light source, optical system, image sensor, and read control circuit. The optical system has a focal distance by which the image of the two-dimensional code is most clearly formed in a state where the two-dimensional code is located at a target point which is a specific distance away from the read window, and the guide light source has a group of light-emitting elements for projecting spotlight beams which intersect at the target point.

REFERENCES:
patent: 5500516 (1996-03-01), Durbin
patent: 5521366 (1996-05-01), Wang et al.

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