摘要:
A method for determining spectral calibration data (λcal(Sd), Sd,cal(λ)) of a Fabry-Perot interferometer (100) comprises: - forming a plurality of filtered spectral peaks (P'1, P'2) by filtering input light (LB1) with a Fabry-Perot etalon (50) such that a first filtered peak (Ρ'1) corresponds to a first transmittance peak (P1) of the etalon (50), and such that a second filtered peak (P'2) corresponds to a second transmittance peak (P2) of the etalon (50), - using the Fabry-Perot interferometer (100) for measuring a spectral intensity distribution (M(Sd)) of the filtered spectral peaks (Ρ'1, P'2), wherein the spectral intensity distribution (M(Sd)) is measured by varying the mirror gap (dFP) of the Fabry-Perot interferometer (100), and by providing a control signal (Sd) indicative of the mirror gap (dFP), and - determining the spectral calibration data (λcal(Sd), Sd,cal(λ)) by matching the measured spectral intensity distribution (M(Sd)) with the spectral transmittance (ΤΕ(λ)) of the etalon (50).
摘要:
The present invention concerns an optical measurement system comprising an electrically tunable Peltier element, a detector for detecting radiation from a radiation source in a measurement area, the detector being in thermal connection with the Peltier element, an electrically tunable Fabry-Perot interferometer placed in the path of the radiation prior to the detector, the Fabry-Perot interferometer being in thermal connection with the Peltier element, and control electronics circuitry configured to control the Peltier element, the interferometer, and the detector. The present invention further concerns a method for analyzing the spectrum of an object.
摘要:
According to an example aspect of the present invention, there is provided a method for analysing a chemical composition of a target (5), the method comprising placing an electrically tunable Fabry-Perot interferometer (4) in a path of radiation emitted by a radiation source (2), and detecting the radiation (3), which has passed the Fabry-Perot interferometer (4) and which has passed or was reflected by the target (5), by means of a detector (6), and wherein detection is made such that multiple pass bands are allowed to be detected simultaneously.
摘要:
The present invention concerns a method for an optical measurement method including the following steps: illuminating an object by light, receiving light from the illuminated object to a tunable Fabry-Perot interferometer, changing mirror gap of the Fabry-Perot interferometer, and detecting the signal passed through the mirror gap of the Fabry-Perot interferometer at different gap lengths. In accordance with the invention the detection is performed at different lengths of times at different gap lengths.