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Laser sensitometer

  • US 6,903,824 B2
  • Filed: 12/20/2002
  • Issued: 06/07/2005
  • Est. Priority Date: 12/20/2002
  • Status: Expired due to Fees
First Claim
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1. An optical apparatus, comprising:

  • a polarized light source adapted to provide a Gaussian beam of light directed along an optical axis;

    a rotatable polarizer disposed in the optical axis adapted to continuously vary an intensity of the beam of light, the polarizer being rotatable about the optical axis; and

    a rotatable polygon disposed in the optical axis, the polygon being rotatable about an axis perpendicular to the optical axis.

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