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Optical information reading apparatus

  • US 20060054844A1
  • Filed: 08/23/2005
  • Published: 03/16/2006
  • Est. Priority Date: 08/25/2004
  • Status: Active Grant
First Claim
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1. An optical information reading apparatus comprising:

  • a pickup unit having a predetermined reading position and configured to optically pickup information of a target when the information is located at the reading position; and

    a marker beam irradiating unit comprising;

    a light beam source configured to emit a light beam;

    a beam pattern forming member arranged at a light beam emitting side of the light beam source;

    a diffusing lens coaxially arranged between the light beam source and the beam pattern forming member and configured to diffuse the light beam emitted from the light beam source; and

    a collective lens coaxially arranged between the diffusing lens and the beam pattern forming member and configured to collect the diffused light beam so that the collected light beam is incident into the beam pattern forming member, the beam pattern forming member being configured to form a marker beam based on the incident collected light beam to irradiate the marker beam, the marker beam having a predetermined beam pattern indicating the reading position of the pickup unit.

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