Fourier transform interference spectrometer based on slow ray light velocity controlling technology
A Fourier transform and spectrometer technology, applied in the field of Fourier transform interference spectrometer, can solve the problems of inability to completely eliminate, limit the resolution of the spectrometer, and increase the volume, so as to overcome vibration and external disturbance, improve spectral resolution, The effect of improving stability
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Embodiment 1
[0013] Embodiment 1, with reference to FIG. 1 , the innovation of the present invention lies in the part of controlling the optical path difference. The comparison between the traditional structure and the new structure is shown in Figure 1. In the figure: 1: incident light; 2: beam splitter; 3: detector; 4: fixed mirror; 5: moving mirror; 6: tunable slow light medium; 7: light speed control system. In the new structure, a series of problems caused by controlling the reflector 5 are avoided (mostly because the changeable range of the optical path difference is limited due to the limited moving distance of the reflector, and the resolution cannot be improved). The moving mirror control system and the dynamic collimation system in the traditional spectrometer are replaced by the slow light medium 6 and the light speed control system 7, which improves the resolution and stability.
Embodiment 2
[0014] Embodiment 2, with reference to FIG. 2 , the light emitted by the light source a passes through the beam splitter and is split into two paths of light. One way directly hits the reflector b, and the other way first passes through the slow-light medium c, and then hits the reflector b. These two paths of light reflect and return to the beam splitter, where they interfere with each other. The interferogram is received by detector d. The received signal is amplified by the filter amplifier e, and input to the computer g after the A / D converter f. The optical path difference of the two paths of light in the interferometer is controlled by a control signal sent by the computer and controlled by the light speed controller h. At the same time, the computer g can manually control the band, and select and control the response band of the beam splitter and the controller through the band controller i.
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