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Laser beam reshaping five-portion lens

A laser beam and lens technology, applied in the laser field, can solve the problems of high processing cost, inability to strengthen with laser shock, and reduce processing efficiency, so as to achieve the effect of low cost and easy promotion and use

Inactive Publication Date: 2010-12-08
BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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AI Technical Summary

Problems solved by technology

The disadvantage of the current method is that part of the energy will be lost by using the mask. For the laser processing technology that requires large energy such as laser shock peening, the mask not only produces energy loss, but also reduces the processing efficiency. Obviously, the use of the mask is not a good way.
The special integrating mirror has dozens or even hundreds of processing surfaces, the processing cost is very high, and it is easy to be damaged by strong laser
For example, the peak power density of the π shaping mirror is only 200MW / cm 2 , the shaping mirror cannot be used for laser shock strengthening and other peak power densities greater than 1GW / cm 2 laser processing technology
In addition, the price of the plastic mirror is very expensive. The price of the plastic mirror of φ6, φ12 and φ34 is 3400 euros, 6000 euros and 15000 euros respectively. Therefore, there are great limitations in the use of this plastic mirror

Method used

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  • Laser beam reshaping five-portion lens
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  • Laser beam reshaping five-portion lens

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Embodiment Construction

[0011] The present invention will be described in further detail below. see figure 1 , 2 , a five-point lens for laser beam shaping, having a disc-shaped substrate with a radius of R1 and a thickness of σ1, the bottom surface of which is a plane, characterized in that the upper surface of the shaping lens is composed of A, B, C, D, E A quadrangular truss composed of five planes, the plane E is parallel to the bottom surface of the shaping lens, the projection of the plane E on the bottom surface of the shaping lens is a square located in the center of the bottom plane, the radius of the circumscribed circle of the plane E is r, r=0.4~ 0.7R1; planes A, B, C, and D have the same shape, it is an isosceles trapezoid whose lower base is an arc, the upper base of this isosceles trapezoid is a side of plane E, planes A, B, C, D The included angles with the bottom surface of the shaping lens are all α, and α=0.01-0.4 radians.

[0012] The radius R1 of the disc-shaped substrate ment...

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Abstract

The invention belongs to laser technique, relates to improvement of laser beam integer type lens, comprising a circular matrix, wherein the radius is R1, the thickness is sigma 1 and the bottom surface is plane. The top surface of the integer type lens is quadrilateral prism composed of A, B, C, D, E plane, or rectangular pyramid constituted of F, G, H, K plane. The born laser peak power density is higher than 3GW / cm2 without losing laser energy, with low cost. The invention facilitates promotion and use.

Description

technical field [0001] The invention belongs to laser technology and relates to the improvement of laser beam shaping lens. Background technique [0002] Since circular laser crystals are easy to grow and the pumping is uniform, the output of most current lasers is a Gaussian-distributed circular spot. For heat treatment, laser shock treatment and other processes, it is necessary to use a square spot to meet various process requirements. Generally, a mask, a special integrating mirror, etc. can be used to obtain a square spot. The disadvantage of the current method is that part of the energy will be lost by using the mask. For the laser processing technology that requires large energy such as laser shock peening, the mask not only produces energy loss, but also reduces the processing efficiency. Obviously, the use of the mask is not a good way. . The special integrating mirror has dozens or even hundreds of processing surfaces, the processing cost is very high, and it is e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B27/12
Inventor 曹子文邹世坤
Owner BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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