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    Fabry-Perot interferometer having supporting elements
    1.
    发明专利
    Fabry-Perot interferometer having supporting elements 未知

    公开(公告)号：FI20205318A1

    公开(公告)日：2021-10-01

    申请号：FI20205318

    申请日：2020-03-31

    Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

    Inventor： STUNS INGMAR ,  KESKISAARI AKI ,  TOIVANEN HANS ,  HOLMLUND CHRISTER

    IPC: G01J3/26 ,  G02B5/28 ,  G02B26/00 ,  G02F1/21

    Abstract: A Fabry-Perot interferometer (300) comprises: - a first mirror plate (100) comprising a first semi-transparent mirror (M1), - a second semi-transparent mirror (M2) to define an optical cavity together with the first mirror (M1), and - one or more first supporting elements (S1) to support the first mirror plate (100), wherein the first mirror plate has a first substantially planar surface (SRF11) and a second substantially planar surface (SRF12) defining the maximum thickness (h100) of the first mirror plate (100), wherein the first mirror plate (100) is bonded to the one or more first supporting elements (S1) by three or more joints (J1), wherein each joint (J1) is bonded to the first mirror plate (100) at a bonding region (REG1), wherein the distance (d1) between each bonding region (REG1) and the first substantially planar surface (SRF11) is greater than 30% of the thickness (h100) of the mirror plate (100), and the distance (d2) between each bonding region (REG1) and the second substantially planar surface (SRF12) is greater than 30% of the thickness (h100) of the mirror plate (100).

    Measuring apparatus comprising a Fabry-Perot interferometer
    5.
    发明专利
    Measuring apparatus comprising a Fabry-Perot interferometer 未知

    公开(公告)号：FI20236129A1

    公开(公告)日：2025-04-13

    申请号：FI20236129

    申请日：2023-10-12

    Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

    Inventor： SAARI HEIKKI ,  HOLMLUND CHRISTER

    IPC: G01J3/26 ,  G01J3/45 ,  G01N21/27 ,  G02B26/00

    Abstract: An apparatus (500) for spectral measurements comprises: - a Fabry-Perot interferometer (FP1) having an adjustable mirror gap (dGAP), and - a control unit (CNT1) for controlling the mirror gap (dGAP), wherein the apparatus (500) is arranged to: - set the mirror gap (dGAP) to a first mirror gap value (dGAP,1) to provide a first spectral transmittance peak (P1,A) at a first wavelength (λA), wherein the first spectral transmittance peak (P1,A) has an effective spectral width (Δλ1,A,EFF), - change the mirror gap (dGAP) to a second different mirror gap value (dGAP,2) to provide a second spectral transmittance peak (P2,A) at the first wavelength (λA), and a third spectral transmittance peak (P1,C) at a second wavelength (λC), and - control the position of a mirror (M2) of the Fabry-Perot interferometer (FP1) near the second different mirror gap value (dGAP,2) such that the effective spectral width (Δλ2,A,EFF) of the second spectral transmittance peak (P2,A) is substantially equal to the effective spectral width (Δλ1,A,EFF) of the first spectral transmittance peak (P1,A).

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