Design method of free-adjustable central symmetric vortex beam mask
A centrosymmetric, vortex beam technology, applied in optics, optical components, instruments, etc., can solve problems such as lack of
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[0040] Taking a mask with a size of 512×512 as an example, a centrosymmetric vortex beam mask is given for a laser with a working wavelength of 532nm. The cone angle α of the axicon lens is selected as 0.06°, and the phase reconstruction factors PRF are respectively taken as 4, 6, 8, and 10. According to the transmittance function of the mask plate in the specific embodiment, a centrosymmetric vortex with controllable light lobe size is finally obtained. Beam mask. figure 1That is, the phase mask of the centrosymmetric vortex beams with different phase reconstruction factors PRF used in the embodiment. The phase reconstruction factor PRF is selected as 4, and the cone angles α of the axicon are 0.03°, 0.04°, 0.05°, and 0.06° respectively. According to the transmittance function of the mask plate in the specific embodiment, a centrally symmetrical vortex with a controllable halo radius is finally obtained. A mask for rotating beams. image 3 That is, it is the phase mask of t...
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