Optics: measuring and testing – Refraction testing
Patent
1980-04-01
1982-01-12
Rosenberger, R. A.
Optics: measuring and testing
Refraction testing
356239, 356365, G01N 2141
Patent
active
043102425
ABSTRACT:
An apparatus for analyzing the deleterious characteristics of optically transparent bodies, including distortion, multiple imaging and birefringence. A beam of light is projected along an optical axis onto a beam splitter. The reflected segment passes through the transparent body and is then reflected back along nearly the same path toward the beam splitter by a retro-reflective screen lying at the image plane of the beam. The portion of the reflected beam passing directly through the beam splitter is detected by an optical sensor in substantial orientation with the axis of the beam reaching it. Distortions and multiple imaging are detected by shape changes and images, respectively, in a pattern of opaque areas superimposed on the originating beam. Birefringence is analyzed by polarizing the originating beam and observing the color pattern and intensity reaching the sensor.
REFERENCES:
patent: 2871756 (1959-02-01), Graves et al.
patent: 3373652 (1968-03-01), Flader
patent: 3578869 (1971-05-01), Irland et al.
patent: 3811775 (1974-05-01), Abu-Saud
Consortini et al., "Investigation of Atmospheric Turbulence by Narrow Laser Beams", Applied Optics, vol. 9, No. 11, (Nov. 1970), pp. 2543-2547.
Genco Louis V.
Task Harry L.
Rosenberger R. A.
Salys Casimer K.
Singer Donald J.
The United States of America as represented by the Secretary of
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