Laser beam focusing integral form paraboloidal mirror

Abstract

The invention provides a laser beam focusing integer type parabolic mirror, comprising mirror surface, each point on the surface satisfies the curved surface equation, wherein, (x,y,z) is one point on the rectangular axis, f is focus of the parabolic mirror, h is the distance between the center of the mirror surface and y axis, satisfying formular, or f<h<3f, D is clear aperture of the parabolic mirror. The parabolic mirror can focus the original laser beam to be strip type light spot of certain size with even light distribution, widely used for laser cutting, laser surface heat treating, laser quenching and the like field for processing material using high energy laser beam. The invention also provides a method for producing the laser beam focusing integer type parabolic mirror formed inone piece using a rotary type high accuracy machine tool, with features of simple technique, increased capacity of reflector for proofing the high power laser beam and heat-sinking capability, and improved focusing quality of laser beam.

Description

technical field [0001] The invention relates to the fields of laser processing and optoelectronic applications, in particular to an optical element for focusing and shaping laser beams. Background technique [0002] The optical element that focuses and shapes the original high-power laser beam into a narrow strip spot with uniform energy distribution is mainly used in laser cutting, laser surface heat treatment, laser quenching and laser spraying and other fields that require high-energy laser beams for material surface treatment. [0003] At present, in the surface heat treatment of laser materials, it is often necessary to process some materials with certain surface morphology. Due to the uneven distribution of laser beam intensity, it is not suitable for direct application to the requirements of surface heat treatment. It is necessary to focus and shape the laser beam to obtain a beam with a suitable shape and uniform intensity distribution, so that the entire surface of ...

AI Technical Summary

Problems solved by technology

The main problem of this technology is that the reflective focusing mirror converges the laser beam into a circle, which is not conducive to the uniformity of the surface treatment of laser materials.

The problems of this technology are: the manufacture is complicated, and the adhesive is easily degraded and deteriorated by the irradiation of high-power laser beams; because the adhesive is not easy to dissipate heat, the small lens is easily deformed after absorbing the heat of the laser, thus affecting the focusing quality

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