Apparatus and method for determining the optical distortion of a

Details Apparatus and method for determining the optical distortion of a Apparatus and method for determining the optical distortion of a

1997-09-03

1999-03-09

Kim, Robert

Optics: measuring and testing

By polarized light examination

With light attenuation

356124, 356445, 356429, G01B 1130

Patent

active

058808434

ABSTRACT:
An apparatus and a method for determining the reflected optical power and the transmitted optical power of a transparent plate, for example the distortion transmitted and the distortion reflected from the surfaces of a glass plate by digital analysis of images in real time. The apparatus including a light source mounted to send a light beam toward a glass plate, at an acute incidence angle regarding the normal of the plate causing in this way a second light beam reflected by the first surface and a third light beam reflected by the second surface of the glass. These reflected beams are directed toward a mirror of first surface which directs the reflected beams toward a light integrating screen and toward a zoom lens to be afterwards directed to a video camera. The optical distortion of the glass plate is determined by measuring the changes of the separation of the reflected beams using the technique of real-time digital image analysis

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