Optical filter laser cutting method

Abstract

The invention relates to the technical field of optical filter cutting, and discloses an optical filter laser cutting method which comprises the following steps: S1, Gaussian light outputted by a green laser is transmitted to a zoom beam expander through a plurality of reflectors; s2, the laser passing through the zoom beam expander is transmitted to a 1 / 2 crystal wavelength plate through a reflector, so that the laser is changed into linear polarized light with an adjustable polarization direction; s3, the linear polarized light is divided into S polarized light and P polarized light after passing through a polarized light cube spectroscope; s4, the P polarized light is transmitted to a combined lens to form an annular light beam of which the energy density is gradually reduced from inside to outside; and S5, the annular light beam is transmitted to a focusing mirror through a reflecting mirror, the annular light beam is focused in the material, the focusing mirror is driven to move through a servo control system, and the material is cut. The laser is transmitted to a to-be-processed optical filter material after passing through a plurality of groups of reflectors and the combined lens, and the cutting damage influence is reduced to be within 5 microns by controlling the laser power and the light spot shape.

Description

Technical field [0001] The present invention relates to a cutting method, and more particularly to a filter laser cutting method. Background technique [0002] In recent years, the mobile phone industry has developed rapidly. With the popularity of high-end mobile phones in 4 photos, 8-fitting high-end mobile phones, the demand in the camera module grows faster, and the current large chip vendors such as five-party photoelectric, crystal optoelectronics, Star Wave Optics, etc. are all expanded to meet the growing consumer demand. The laser cut is currently the main cutting method, and the high power density laser beam is used to illuminate the cut material so that the material is quickly heated to the vaporization temperature, evaporated to form a hole, and the hole continuously forms a width of the width as the light beam moves with the light beam , Complete the cutting of materials. The performance of the laser manufacturing industry is inseparable from the overall industries. ...

AI Technical Summary

Problems solved by technology

The performance of the laser manufacturing industry is inseparable from the prosperity of the overall industry. The cutting damage of existing laser cutting equipment is relatively large, usually 30 microns or even 50 microns, and the cutting effect is not ideal.

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