A high accuracy and stability thin beam deflection phase control algorithm based on a liquid crystal spatial light modulator
A spatial light modulator, high-stability technology, applied in optics, instruments, computing, etc., can solve the problems of high cost, complex structure, bulky, etc., to reduce the requirements of the adjustment accuracy, improve the stability, and stabilize the deflection angle. Effect
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[0074] 1. Computer simulation to simulate the stability of the symmetrical radial sub-aperture method, and compare it with the existing radial sub-aperture method.
[0075] 1) Set the simulation parameters according to the actual device parameters:
[0076] Modulator pixel width: d=15μm; modulator pixel number: 512×512;
[0077] Incident light wavelength: 730nm; incident light form: fundamental mode Gaussian beam waist / limited circular aperture plane wave;
[0078] Incident light aperture: 3mm; area scanning angle difference: 10μrad;
[0079] Scanning minimum angular interval: 0.5μrad.
[0080] 2) Simulate the dependence of the output angle error and the input alignment error of the radial subaperture method and the symmetrical radial subaperture method respectively. Such as Figure 4~7 shown. Comparing the simulation results of the two algorithms draws several conclusions:
[0081] a. Contrast Figure 4 , Figure 5 It is known that the δ of the radial subaperture meth...
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