Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1994-03-18
1995-08-01
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356345, G01B 902
Patent
active
054384125
ABSTRACT:
A phase conjugate interferometer includes a laser light source, an optical lens (through which the laser beam is diverged) disposed at the end of the optical fiber, a paraboloidal mirror surface to be tested which reflects the laser beam diverged by the objective lens, a semi-transparent mirror disposed between the objective lens and the paraboloidal mirror surface for transmitting the laser beam from the objective lens to the paraboloidal mirror surface, a light reflection portion having both a parallel plane glass plate with a reference flat surface and a non-linear optical crystal for causing a phase conjugate wave front, and a screen. The light reflection portion reflects the incident laser beam reflected by the paraboloidal mirror surface as two laser beams, one with a reference flat surface and the other with a phase conjugate wave front caused by the non-linear optical crystal. The semi-transparent mirror reflects the two laser beams reflected by the light reflection portion and then by the paraboloidal mirror surface. The screen displays an interference fringe pattern formed by the two laser beams reflected by the semi-transparent mirror.
REFERENCES:
"Interferometer with a Self-Pumped Phase-Conjugating Mirror", Feinberg, Optical Letters, Nov. 1983, pp. 569-571.
Agency of Industrial Science Technology, Ministry of Internation
Turner Samuel A.
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