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Optical system having a reflecting surface

  • US 6,268,963 B1
  • Filed: 08/20/1998
  • Issued: 07/31/2001
  • Est. Priority Date: 08/22/1997
  • Status: Expired due to Term
First Claim
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1. An optical system comprising:

  • a stop; and

    an optical element which is integrally provided with a plurality of curved reflecting surfaces, wherein in said optical element, an optical path of a ray of light, successively reflected by said plurality of curved reflecting surfaces and arriving at the center of an image plane via the center of said stop, intersects itself any of twice, three times, and four times, and wherein at least one of said plurality of curved reflecting surfaces has a rotation-asymmetrical shape.

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