211.
    发明专利
    未知

    公开(公告)号:DE2121202B2

    公开(公告)日:1973-01-18

    申请号:DE2121202

    申请日:1971-04-29

    Abstract: Arrangement for correlation spectroscopy by means of the absorption or emission spectrum of a gas. Light from the gas is arranged to be fed to an analyzer, comprising a light transmitting disc arranged in front of a detector. One side of the disc is supplied with an interference filter which within at least one segment of the filter has transmission characteristics as a function of the wavelength within a determined range of wavelengths. The range of wavelengths corresponds to the absorption or emission spectrum of a searched ingredient in the gas. The other parts of said filter have different transmission characteristics. These parts have different transmission characteristics relative to one another and are arranged to be alternatively inserted into the beam path in front of the detector.

    212.
    发明专利
    未知

    公开(公告)号:FR2077554A1

    公开(公告)日:1971-10-29

    申请号:FR7045045

    申请日:1970-12-14

    Abstract: An optical correlator having an optical wedge or other device for producing a spatially dispersed pattern of light in a plane, the light being characterized by zones of relatively high intensity and low intensity corresponding to spectra present in the incident light or the Fourier transform thereof. The dispersed light is alternately or simultaneously passed through a first mask having a pattern of opaque and transparent regions or lines positioned to correlate with the zones of relatively high intensity light and a second mask having a plurality of opaque and transparent regions or lines positioned to correlate with the relatively low intensity zones of light. A photodetector examines the light passing through the masks and produces and output signal which can be analyzed to determine the character of the incident radiation.

    DISPERSION MEASURING DEVICE, PULSE LIGHT SOURCE, DISPERSION MEASURING METHOD, AND DISPERSION COMPENSATING METHOD

    公开(公告)号:EP3951337A1

    公开(公告)日:2022-02-09

    申请号:EP20785108.0

    申请日:2020-03-27

    Inventor: INOUE, Takashi

    Abstract: A dispersion measurement apparatus 1A includes a pulse forming unit 3, a correlation optical system 4, a photodetection unit 5, and an operation unit 6. The pulse forming unit 3 forms a light pulse train Pb including a plurality of light pulses having time differences and center wavelengths different from each other from a measurement target light pulse Pa output from a pulsed laser light source 2. The correlation optical system 4 receives the light pulse train Pb output from the pulse forming unit 3 and outputs correlation light Pc including a cross-correlation or an autocorrelation of the light pulse train Pb. The photodetection unit 5 detects a temporal waveform of the correlation light Pc output from the correlation optical system 4. The operation unit 6 estimates a wavelength dispersion amount of the pulsed laser light source 2 based on a feature value of the temporal waveform of the correlation light Pc. Thus, a dispersion measurement apparatus, a pulsed light source, a dispersion measurement method, and a dispersion compensation method capable of measuring a wavelength dispersion by a simple configuration are realized.

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