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Light beam scanning system

  • US 6,195,189 B1
  • Filed: 10/26/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 10/24/1997
  • Status: Expired due to Term
First Claim
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1. A light beam scanning system comprising:

  • a beam shaper means which shapes a light beam emitted from a light source, wherein the beam shaper means comprises a diverging optical system which converts the light beam into divergent light;

    a deflector means which deflects the light beam to scan a surface in a main scanning direction; and

    a scanning/imaging optical system which causes the light beam deflected by the deflector to form an image on the surface and scan the surface;

    wherein the light beam entering the scanning/imaging optical system is the divergent light converted by the diverging optical system;

    wherein the scanning/imaging optical system consists of, in an order from the light source side, a first lens element and a second lens element, wherein the scanning/imaging optical system has first to fourth surfaces as numbered from the light source side and satisfies the following formulae (1) to (3);

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