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Optical system of laser beam reader

  • US 5,043,569 A
  • Filed: 01/26/1990
  • Issued: 08/27/1991
  • Est. Priority Date: 11/04/1987
  • Status: Expired due to Term
First Claim
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1. An optical system for a laser beam reader comprising:

  • a laser projecting portion having an optical axis for projecting a converging infrared radiation beam along an optical path towards an object;

    a condenser lens located in said optical path of the projected beam of infrared projected by said laser projecting portion and having a transmitting portion for permitting the projected beam of infrared radiation to pass therethrough without changing the direction of the projected beam of infrared radiation from said laser projecting portion to said optical axis, and a condensing portion for condensing a beam of light reflected from the object;

    a light receiving element for detecting the light quantity of condensed light reflected from the object;

    a guide light projecting portion for projecting a visible guide light; and

    a light composing element for composing the beam of infrared radiation and the visible guide light.

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