Polarization control method used in fiber point-diffraction interferometer wave surface reference source
A point-diffraction interference and polarization control technology, which is applied to optics, instruments, optical components, etc., to avoid blindness and improve the control speed
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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 Theoretical calculation of the rotating polarizer method, and then calculate the voltage required to control the two channels of the polarization controller to achieve the circular polarization state. On the basis of the fine adjustment of the theoretical calculation, fine-tune the other two control voltages to finally obtain the circular polarization state, and then you can The polarization control system is conveniently moved out of the optical path so no additional errors are introduced.
[0026] Theoretical calculation method:
[0027] Theoretical analysis of the degree of freedom of the po...
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