×

Optical reader with ultraviolet wavelength capability

  • US 20050035207A1
  • Filed: 07/02/2004
  • Published: 02/17/2005
  • Est. Priority Date: 09/11/1998
  • Status: Active Grant
First Claim
Patent Images

1. An optical reader for reading a bar code having ultraviolet-wavelength-responsive properties, the reader comprising:

  • an ultraviolet light source for generating ultraviolet light illuminating a target region at a first wavelength;

    a photodetector for detecting light incident thereon having a wavelength within a predetermined range of wavelengths;

    an optical system having;

    a projection portion for directing the ultraviolet light along a projection path extending from the ultraviolet light source to the target region, a collection portion for collect light at a second wavelength received from a bar code when the bar code occupies the target region and for delivering light having the second wavelength along a collection path extending from the target region to the photodetector; and

    a decoder receiving the output of the photodetector and producing in response thereto electrical signals indicative of information encoded in the bar code.

View all claims
  • 11 Assignments
Timeline View
Assignment View
    ×
    ×