Optical system for forming point ring light spot

A technology of an optical system and an optical imaging system, which is applied in the field of optical systems for forming point-ring light spots, can solve the problems of complex processing of optical components, high price, and high system complexity, and achieves easy-to-change process requirements, reduced energy loss, and simple system. Effect

Pending Publication Date: 2021-12-17
方笑尘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Han’s solution can change the spot structure, but the system structure cannot provide zoom capability, and cannot make the spot larger or smaller as a whole
[0005] 2. Coherent's scheme has high system complexity and is extremely expensive; the processing of optical components such as dot-shaped spot focus lens, conical lens and annular spot focus lens used in Han's scheme is very complicated and expensive
[0006] None of the existing technologies on the market can meet the requirements of laser processing for spot ring spots, nor can they provide a low-cost and reliable system for realizing spot ring spots

Method used

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  • Optical system for forming point ring light spot
  • Optical system for forming point ring light spot
  • Optical system for forming point ring light spot

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Effect test

Embodiment 1

[0051] Example 1, in a specific usage scenario of the present invention, it is required to form a point ring-shaped spot structure: the central spot size is 50 microns, the ring-shaped spot diameter is 150 microns, the ring-shaped spot width is 50 microns, and the point spot energy is 60%. Ring spot power 40%. The input fiber core diameter is 25 microns and the numerical aperture is 0.06. According to this embodiment Figure 4 The shown structure designs a point ring spot optical system, wherein: the focal length of the collimator lens 3LC is 100 millimeters; the focal length of the focusing lens 3LF is 100 millimeters; 2 mm, the bottom diameter is 15 mm, and the effective clear aperture is 12 mm. According to the Gaussian distribution characteristics of the beam, the diameter of the top plane part of the frustum-shaped optical deflection element 2 is 6 mm, and the angle between the surrounding cone surface and the top plane is 0.093 degrees. . Through this optical system, ...

Embodiment 2

[0052] Embodiment 2, in another specific application scenario of the present invention, the structure required to form a point ring-shaped spot is: the size of the center spot is 100 microns, the diameter of the ring-shaped spot is 250 microns, the width of the ring-shaped spot is 50 microns, and the energy of the spot spot is 60% , ring spot power 40%. The input fiber core diameter is 25 microns and the numerical aperture is 0.06. According to this embodiment Figure 5 The shown structure design a point ring spot optical system, in which: the focal length of the collimator lens 3LC is 50 mm; the focal length of the focusing lens 3LF is 100 mm; 3 mm concave spherical surface, surrounded by parallel flat plates, the focal length of the central part is -6101.6 mm; the frustum-shaped optical deflection element 2 is made of quartz glass with a refractive index of 1.46, the height is 2 mm, the bottom is 8 mm, and the effective aperture is 6 mm. According to the Gaussian distribut...

Embodiment 3

[0053] Embodiment 3, in another specific application scenario of the present invention, the structure required to form a point ring-shaped spot is: the size of the central spot changes from 100 to 300 microns, correspondingly, the diameter of the ring-shaped spot changes from 200 to 600 microns, The ring spot width is changed from 50 microns to 150 microns, the point spot energy is 60%, and the ring spot energy is 40%. The input fiber core diameter is 25 microns and the numerical aperture is 0.06. According to this embodiment Figure 8The optical path shown is designed with a point ring spot optical system, in which: the focal length of the collimator lens 3LC is 50mm; The focal length of the lens 3LF1 is 541.6 millimeters, and the focal length of the second lens 3LF2 is 117.87 millimeters. Zooming is realized by adjusting the distance between the two lenses; Its focal length is minus 1073.6mm. The frustum-shaped optical deflection lens composite element 5 is made of quartz ...

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Abstract

The invention discloses an optical system for forming a point ring light spot. The optical system comprises an optical fiber, a frustum-shaped optical deflection element and an optical imaging system; the frustum-shaped optical deflection element and the optical imaging system are arranged on an optical fiber output light path, and the optical imaging system is arranged on the front side and / or the rear side of the frustum-shaped optical deflection element; and after light emitted by the optical fiber passes through a system composed of the frustum-shaped optical deflection element and the optical imaging system, a light spot of a point ring structure is formed on a certain surface. According to the optical system, various light spot structure requirements can be met, meanwhile, elements forming the system can be manufactured through a traditional optical processing technology, the manufacturing difficulty of the system is reduced, and then the manufacturing cost of the system can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of laser processing, in particular to an optical system for forming spot rings. Background technique [0002] In the field of high-power laser processing, the point ring spot is introduced. By preheating the material around the central working point, technical advantages such as suppressing material splashing, preheating and slow cooling, better processing efficiency, and better processing quality can be achieved. At present, there are two main technical ways to realize point ring-shaped spot in the market: Coherent company forms point spot at the center and ring-shaped spot at the edge through multi-layer optical fiber at the same time; The optical system of a collimator lens, a dot-shaped spot focusing lens, a conical lens and an annular spot focusing lens is used to obtain a spot ring spot. Among them: the former system has high complexity and is extremely expensive; the processing of optical components such as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/06B23K26/064B23K26/067B23K26/073G02B27/09
CPCB23K26/064B23K26/067B23K26/0734B23K26/0648G02B27/0927G02B27/095
Inventor 方笑尘方强
Owner 方笑尘
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