Laser diode scanner with minimized dead zone

Details Laser diode scanner with minimized dead zone Laser diode scanner with minimized dead zone

1991-12-17

1994-01-18

Turner, Samuel A.

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710

Patent

active

052801640

ABSTRACT:
A laser scanning system for reading bar code symbols in which the "dead zone" is minimized by appropriate positioning and size of the optical components. The vertical height (non-scan direction) of the collecting mirror is minimized, while the horizontal width (scan direction) is increased proportionally, thereby collecting less specular reflected light. The optical components are mounted on a single printed circuit board so that the optical paths are angularly offset for minimizing the specular component, while maintaining an optically-aligned relationship. The printed circuit board may be mounted in hand held laser scanning head having a single exit window.

REFERENCES:
patent: 5015833 (1991-05-01), Shepard et al.
patent: 5140144 (1992-08-01), Shepard et al.

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