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Optical system for image observation

  • US 6,134,051 A
  • Filed: 11/04/1998
  • Issued: 10/17/2000
  • Est. Priority Date: 11/06/1997
  • Status: Expired due to Term
First Claim
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1. An optical system for observation of an image comprising:

  • a plurality of light sources;

    an image display device;

    an image-forming optical system formed from a decentered prism; and

    an optical filter having a periodic structure in at least one direction provided in an optical path near said image display device,wherein said optical filter is placed between said light sources and said image display device so that images of said plurality of light sources are superimposed on one another in an exit pupil of said image-forming optical system,wherein nonuniformity in illumination when an observer views said image is minimized.

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