Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1998-04-22
1999-07-06
Kim, Robert
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356345, 359291, G01B 902
Patent
active
059203919
ABSTRACT:
The invention provides a filter of the Fabry-Perot interferometer type for electromagnetic radiation having spectral density that is modified by a gas. The filter comprises a body which is transparent to said electromagnetic radiation, at least in its part through which the radiation passes. Said part comprises at least two portions possessing two facing surfaces that are mutually parallel and substantially plane. A "first" one of said portions is movable in a direction that is substantially perpendicular to the pair of facing surfaces. The filter further comprises: means for moving said facing surfaces between two extreme positions under the action of an electromagnetic field, and means for limiting adhesion between said surfaces in at least one of said positions in which said surfaces are at a distance apart which is small compared with the mean wavelength of the radiation passing through them.
REFERENCES:
patent: 5142414 (1992-08-01), Koehler
patent: 5561523 (1996-10-01), Blomberg et al.
patent: 5619046 (1997-04-01), Engstrom et al.
patent: 5739945 (1998-04-01), Tayebati
patent: 5835216 (1998-11-01), Koskinen
Grasdepot Fran.cedilla.ois
Suski Jan
Kim Robert
Pojunas Leonard W.
Schlumberger Industries S.A.
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