Optics: measuring and testing – Of light reflection
Patent
1990-08-21
1992-04-21
Evans, F. L.
Optics: measuring and testing
Of light reflection
356346, G01N 2155
Patent
active
051061961
ABSTRACT:
A specular reflection analyzer uses opposed parabolic mirror sections to direct a focussed beam at an angle of incidence against a sample surface and to receive a reflected beam at a corresponding angle of reflection. A first collimated beam of light is directed at a constant angle against the first parabolic mirror from a beam diverter movable parallel to the mirror's axis of symmetry and within the first collimated beam of light. Translation of the constant angle beam along a meridian on the surface of the first parabolic mirror changes the angle of incidence of a beam focused on the sample without changing the focal point. The light reflected from the sample is received in a corresponding manner by the second parabolic mirror and transformed into a collimated beam of constant angle to be received by a second beam diverter tracking the first beam diverter. Transfer optics may be used to adapt the apparatus for use in a conventional transmission spectrometer.
REFERENCES:
patent: 3240111 (1966-03-01), Sherman et al.
patent: 3420138 (1969-01-01), Hansen
patent: 3491366 (1970-01-01), Harrick
patent: 4640617 (1987-02-01), Hughes et al.
patent: 4730882 (1988-03-01), Messerschmidt
patent: 4812041 (1989-03-01), Doyle
patent: 4966457 (1990-10-01), Hayano et al.
Evans F. L.
Hantis K. P.
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