Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1997-10-28
1999-04-27
Kim, Robert
Optics: measuring and testing
By particle light scattering
With photocell detection
25033907, 25033908, G01B 902
Patent
active
058984950
ABSTRACT:
A novel variation of Michelson's interferometer uses tilt- and shear-compensation optics to allow various mirror motions to produce variation of path difference. The tilt-compensation mechanism consists of two complementary reflections from a single plane mirror to produce a beam having a constant angle of propagation, typically the same as the input beam. Using a retroreflector to invert the image of the single plane mirror before the second reflection produces the complementary reflections. A particularly efficient embodiment of the present invention uses a balanced disk-shaped mirror to effect very rapid variation of path difference by nutation or precession. Other advantages of tilt-compensation include photometric stability. This interferometer has applications in spectrometry, spectral imaging and metrology.
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Kim Robert
Lee Andrew H.
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