Method and apparatus for compact Fabry-Perot imaging spectrometer
First Claim
1. A tunable Fabry-Perot optical filter for providing a spatially accurate wavelength-resolved image of a sample having two spatial dimensions comprising:
- plural filter elements having an initial predetermined spacing between adjacent filter elements; and
a micro electro-mechanical system (“
MEMS”
) actuator,wherein one of said plural filter elements is attached to said MEMS actuator so that said MEMS actuator is capable of moving said one filter element relative to another of said plural filter elements to thereby tune said Fabry-Perot optical filter to produce said image.
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Abstract
A method and apparatus for compact Fabry-Perot imaging spectrometer is presented. More specifically, in one embodiment, a tunable Fabry-Perot optical filter for providing a spatially accurate wavelength-resolved image of a sample having two spatial dimensions is presented. The optical filter may include plural filter elements having an initial predetermined spacing between adjacent filter elements; and a micro electro-mechanical system (“MEMS”) actuator. One of the plural filter elements may be attached to the MEMS actuator so that the actuator is capable of moving the one filter element relative to another of the plural filter elements to thereby tune the Fabry-Perot optical filter.
60 Citations
37 Claims
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1. A tunable Fabry-Perot optical filter for providing a spatially accurate wavelength-resolved image of a sample having two spatial dimensions comprising:
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plural filter elements having an initial predetermined spacing between adjacent filter elements; and a micro electro-mechanical system (“
MEMS”
) actuator,wherein one of said plural filter elements is attached to said MEMS actuator so that said MEMS actuator is capable of moving said one filter element relative to another of said plural filter elements to thereby tune said Fabry-Perot optical filter to produce said image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for tuning a Fabry-Perot optical filter for providing a spatially accurate wavelength-resolved image of a sample having two spatial dimensions, the method comprising the steps of:
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providing a Fabry-Perot filter having plural filter elements having an initial predetermined spacing between adjacent filter elements; attaching one of said plural filter elements to a micro electro-mechanical system (“
MEMS”
) actuator; andproviding power to the MEMS actuator to thereby move said one filter element relative to another of said plural filter elements to thereby tune the Fabry-Perot optical filter for providing said spatially accurate wavelength-resolved image of said sample having two spatial dimensions. - View Dependent Claims (9, 10)
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11. A system for obtaining a spatially accurate wavelength resolved image of a sample, comprising:
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a photon emission source for illuminating the sample with a plurality of photons to thereby produce photons scattered by the sample; an optical lens for collecting the scattered photons; a first lens for directing said scattered photons; a tunable Fabry-Perot filter for receiving the collected scattered photons and providing therefrom filtered photons; and a second lens for directing said filtered photons; a photon detector for receiving the filtered photons and obtaining therefrom an image of the sample, wherein said filter comprises; plural filter elements having an initial predetermined spacing between adjacent filter elements; and a micro electro-mechanical system (“
MEMS”
) actuator,wherein one of said plural filter elements is attached to said MEMS actuator so that said MEMS actuator is capable of moving said one filter element relative to another of said plural filter elements to thereby tune said Fabry-Perot optical filter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for obtaining a spatially accurate wavelength-resolved image of a sample, comprising:
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providing a sample; illuminating the sample with a plurality of photons to thereby produce photons scattered by the sample; collecting the scattered photons; providing a tunable Fabry-Perot filter; receiving the collected scattered photons with the tunable Fabry-Perot filter and providing therefrom filtered photons; and receiving the filtered photons with a photon detector and obtaining therefrom said spatially accurate wavelength-resolved image of the sample. - View Dependent Claims (35, 36, 37)
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Specification