A Laser Beam Splitting System Based on Freeform Surface Lens
A curved lens and lens technology, applied in optics, optical components, instruments, etc., can solve problems such as beam splitting effect deviating from expected design, weakening system diffraction effect lens surface, etc., to reduce material consumption, weaken diffraction effect, and achieve precise control Effect
Active Publication Date: 2022-05-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0008] In view of this, the purpose of the present invention is to provide a laser beam splitting system based on a free-form surface lens in order to solve the problem that the beam splitting effect deviates from the expected design due to the diffraction effect brought by the laser in the existing geometric optics beam splitting technology; The invention achieves high-precision beam splitting by synchronously adjusting the illumination and wavefront of the beam, and can produce an easy-to-process lens surface while weakening the diffraction effect of the system
Method used
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Embodiment 1
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[0112] where n=1,2,3,4,5; m=1,2,3,4,5. (ξ
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[0116] Further, other parameters and surface shape data of the lens surface are obtained.
Embodiment 2
Embodiment 3
[0122] In this embodiment, a Gaussian light source with a plane wavefront is split into a 5×5 rectangular uniform light spot array on the target surface.
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Abstract
The invention relates to a laser beam splitting system based on a free-form surface lens, belonging to the field of laser beam shaping. The purpose of the present invention is to solve the problem existing in the existing geometric optics beam splitting technology that the beam splitting effect deviates from the expected design due to the diffraction effect brought by the laser, and to provide a laser beam splitting system based on a free-form surface lens; the laser beam passes through the first After the lens and the second lens form a Gaussian beam array beam, the beam forms a discrete beam-splitting spot array at the target position after a certain distance of propagation. The invention realizes high-precision beam splitting by synchronously regulating the illuminance and wave front of the light beam, and can produce an easy-to-process lens surface while weakening the diffraction effect of the system.
Description
A laser beam splitting system based on free-form surface lens technical field [0001] The present invention relates to a laser beam splitting system based on a free-form surface lens, which belongs to the field of laser beam shaping. Background technique [0002] Laser beam splitters are used in parallel laser processing such as laser cutting and laser drilling, laser measurement and inspection, laser scanning, It is widely used in laser projection, structured light illumination and optical communication. The commonly used diffractive optical element DOE realizes beam separation by injecting energy into a specified diffraction order, and has a volume It has the advantages of small size and light weight, but its dependence on wavelength is very strong, and it is difficult to balance high diffraction efficiency and low processing difficulty. light based Learning the flexible and precise control of light by free-form surfaces, people began to seek geometrical optics beam ...
Claims
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IPC IPC(8): G02B27/12G02B27/10G02B27/00
CPCG02B27/123G02B27/106G02B27/0012
Inventor 冯泽心司佳程德文王涌天
Owner BEIJING INSTITUTE OF TECHNOLOGYGY