Laser diode scanner with enhanced visibility at an aiming distan

Details Laser diode scanner with enhanced visibility at an aiming distan Laser diode scanner with enhanced visibility at an aiming distan

1992-04-09

1994-04-19

Willis, Davis L.

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710

Patent

active

053047885

ABSTRACT:
The visibility of a laser beam emitted by a laser diode in a scanner is enhanced to facilitate aiming the laser beam at a symbol to be read. An aperture stop in an optical train has an increased dimension along a non-scan direction. The magnification of a focusing lens in the optical train is increased. Laser diode astigmatism is affirmatively used to enhance visibility. What results is an aiming spot (or aiming scan line) at a farther plane (d6) that is more visible to the user than the scanning spot at a closer plane (d3), at which closer plane the scanner is able to read a bar code.

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Literature from Microscan Systems, Inc., Tukwila, Wash. on MS-1000 Laser Scanner-Publication Date Unknown.

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