Optical system

Details Optical system Optical system

2007-04-04

2009-12-29

Le, Thien M. (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S462060, C235S462140, C235S462350, C235S462420, C235S462430, C235S462450, C235S462490, C235S472010, C235S472020, C235S472030

Reexamination Certificate

active

07637431

ABSTRACT:
An optical system used in a barcode scanner is disclosed to include a lens, two LEDs arranged at two sides of the lens, two condensers arranged in front of the LEDs, and two curved reflectors with multiple curvatures for reflecting a major part of light from the LEDs through the condensers onto the left and right sides of an image mapping surface on a barcode and a minor part of light onto the center area of the image mapping surface so that the receiving characteristic of the lens can pick up an evenly distributed bright image from the image mapping surface on the barcode and the posterior image processing of the barcode scanner can obtain a strong and clear image signal to facilitate barcode and to increase recognition rate and accuracy.

REFERENCES:
patent: 6385352 (2002-05-01), Roustaei
patent: 6708888 (2004-03-01), Liou et al.
patent: 2008/0035733 (2008-02-01), Vinogradov et al.

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