Optical testing method and apparatus employing a distortion veri

Details Optical testing method and apparatus employing a distortion veri Optical testing method and apparatus employing a distortion veri

1999-04-27

2000-05-02

Kim, Robert H.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356360, 356348, G01B 902

Patent

active

060579226

ABSTRACT:
A method and apparatus for testing the configuration of an optical element includes an optical test-set having a holographic optical element designed to obtain a null wave front at the surface of an optical element under test; an interferometer for viewing the test-set, the optical test set and interferometer having optical distortions; and a distortion verification grid (DVG) located in the optical test-set, the DVG comprising a thin opaque sheet of material having a predistorted array of asymmetric holes arranged such that the image of the array of holes formed by the interferometer will be regular and the images of the holes will be symmetric when the optical distortions have been correctly understood and accounted for in the design of the DVG and the distortion correction function.

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