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Collimator lens and optical scanning apparatus using the same

  • US 6,396,640 B2
  • Filed: 03/28/2001
  • Issued: 05/28/2002
  • Est. Priority Date: 03/30/2000
  • Status: Expired due to Fees
First Claim
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1. A collimator lens comprising, successively from a parallel luminous flux side, a first lens having a positive refracting power, second and third lenses having a negative composite refracting power, a fourth lens having a positive refracting power, and a fifth lens having a positive refracting power, said second and third lenses being cemented together, one of said second and third lenses having a negative refracting power, the other having a positive refracting power;

  • said collimator lens satisfying the following conditional expression (1);

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