公开(公告)号：US20170322085A1

公开(公告)日：2017-11-09

申请号：US15524630

申请日：2015-11-04

Applicant: Spectral Engines Oy

Inventor： Jarkko Antila ,  Uula Kantojärvi ,  Jussi Mäkynen

IPC: G01J3/45 ,  G01J3/26 ,  G01J3/02

CPC classification number: G01J3/45 ,  G01J3/0202 ,  G01J3/0256 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/32 ,  G02B5/28

Abstract: 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.

公开(公告)号：US20170138790A1

公开(公告)日：2017-05-18

申请号：US15321756

申请日：2015-06-29

Applicant: Spectral Engines Oy

Inventor： Jarkko Antila ,  Uula Kantojärvi ,  Altti Akujärvi ,  Mikko Tuohiniemi ,  Jussi Mäkynen

IPC: G01J3/02 ,  G01J3/45 ,  G01J3/26

CPC classification number: G01J3/0297 ,  G01J3/0227 ,  G01J3/0264 ,  G01J3/027 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/28 ,  G01J3/45 ,  G01J2003/2879 ,  G02B26/001

Abstract: 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 (P′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 (P1) of the etalon (50), using the Fabry-Perot interferometer (100) for measuring a spectral intensity distribution (M(Sd)) of the filtered spectral peaks (P′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 (TE(λ)) of the etalon (50).

公开(公告)号：US20170350760A1

公开(公告)日：2017-12-07

申请号：US15524628

申请日：2015-11-05

Applicant: Spectral Engines Oy

Inventor： Jarkko Antila ,  Uula Kantojärvi ,  Jussi Mäkynen

IPC: G01J3/26 ,  G01J3/02

CPC classification number: G01J3/26 ,  G01J3/0202 ,  G01J3/0256 ,  G01J3/0286

Abstract: 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.