Polarization Control Method Used in Wavefront Reference Source of Fiber Point Diffraction Interferometer
A point-diffraction interference and polarization control technology, applied in optics, instruments, optical components, etc., to achieve the effect of improving the control speed and avoiding blindness
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[0025] The inventive idea of the present invention is: the technical idea of the present invention is to change the polarization state of the optical fiber diffracted beam through a polarization controller, and then use a circularly polarized light detection system to detect the polarization state of the beam. The difference is that the polarization state of the initial beam is used The theoretical calculation of the rotating polarizer method, and then the voltage required to control the two channels of the polarization controller to reach the circular polarization state is calculated. Based on the fine adjustment of the theoretical calculation, the other two control voltages are fine-tuned, and the circular polarization state is finally obtained. The polarization control system is conveniently moved out of the optical path, so that no additional errors are introduced.
[0026] Theoretical calculation method:
[0027] Theoretical analysis of the degree of freedom of the control...
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