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Ophthalmoscope with linear polarizer

  • US 4,998,818 A
  • Filed: 08/23/1989
  • Issued: 03/12/1991
  • Est. Priority Date: 08/23/1989
  • Status: Expired due to Term
First Claim
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1. In an ophthalmoscope having a housing, a viewing passage therethrough, and an illumination source positioned to project a beam of light through said viewing passage;

  • means for selectively modifying the light projected through said passage and the light observed through said passage comprising;

    a frame member mounted in said housing adjacent the viewing passage and the illumination source beam of light;

    a plurality of light filtering members disposed in said frame member; and

    single actuating means for selectively positioning said frame member to align one light filtering member in the illumination source beam of light and another light filtering member in said viewing passage.

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