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Method and apparatus for determining the optical properties of a lens

  • US 5,301,004 A
  • Filed: 03/13/1992
  • Issued: 04/05/1994
  • Est. Priority Date: 03/13/1992
  • Status: Expired due to Fees
First Claim
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1. A device without a moving part for determining optical properties of a lens comprising, means to project a beam of light along a path having an axis, a test plane located on said path, an occluder having a single shaped opening defined by a single border positioned on said path, area detection means responsive to light received from said shaped opening for providing a signal representative of light distribution on said detection means, evaluation means for converting said signal to values representing the optical properties of a lens located at said test plane, and means to report said values.

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