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Apparatus for determining the distance between pupils

  • US 7,219,995 B2
  • Filed: 08/25/2004
  • Issued: 05/22/2007
  • Est. Priority Date: 08/25/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus for determining the distance between the pupils for defining precisely the parameters relevant to grinding spectacle lenses for the alignment of optical lenses in a spectacle frame, as an integral component of a video centering system provided with a camera (2), a zooming device (3), a computer (4) with a monitor (5) and a calibration device (1) in which the size (OG) of the subject is presented by indicia (A;

  • B) on the calibration device (1) disposed in the plane of the spectacle lens of the spectacle socket to be measured, the indicia (A;

    B) being detected by the camera (2) and transmitted to the computer (4) for determining the actual value of the shooting distance (AE) which forms the basis for the value of the position (P) of the distance between the pupils.

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