Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1988-07-12
1990-02-06
Scott, Jr., Leon
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 1100
Patent
active
048984701
ABSTRACT:
Apparatus for testing circular cylindrical or conical specularly reflective surfaces of pieces, e.g. optical elements or metal components, to be tested. A collimated light beam from a Fizeau interferometer is directed axially onto a specularly reflective conical surface of a member which reflects the light onto the surface to be tested. The surface to be tested, directly or indirectly, reflects the light onto the conical specularly reflective surface which, in turn, reflects it back towards the interferometer. Information on the trueness of the surface to be tested can be gained from inspection of the pattern of the interference between light projected by the interferometer and light reflected back to the interferometer.
REFERENCES:
patent: 3907438 (1975-09-01), Holeman
patent: 4009965 (1977-03-01), Pyror
patent: 4131365 (1978-12-01), Pyror
patent: 4358202 (1982-11-01), Puffer et al.
patent: 4606640 (1986-08-01), Hirst
Hayes et al.; "Testing of Nonlinear Diamond-Tuned Reflaxions"; Appl. Opt., vol. 20, No. 2; 15 Jan. 1981.
Hall et al.; "A Simple Interferometer for the Precise Measurement of the Straightness of Ground Surfaces"; Microtecnic, vol. XVI, No. 1; Feb. '62.
Eastman Kodak Company
Jr. Leon Scott
Turner John B.
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