Laser cutting method and device for light filter

Abstract

The invention discloses a laser cutting method and device for a light filter. The laser cutting device comprises an ultrafast laser device, a light beam shaping module, a focusing objective lens, a visual detection device and a moving platform, wherein the visual detection device is located at the upper portion of the focusing objective lens, the moving platform is located at the lower portion ofthe focusing objective lens to be used for bearing the light filter, the focusing objective lens is an imaging objective lens of the visual detection device, the ultrafast laser device emits an ultrashort pulse laser beam into the light beam shaping module, the ultrashort pulse laser beam is shaped into a linear non-diffracting light beam of evenly-distributed energy to be emitted into the focusing objective lens, and the linear non-diffracting light beam is focused by the focusing objective lens to form a high-energy-density non-diffracting light beam for cutting the light filter. According to all elements cut and obtained by the laser cutting method and device, the sections and the upper and lower surfaces are all formed regularly, the straightness is good, surface film layers have no obvious damage, and the thickness and position of modified layers formed in the cutting process can be selected according to the thickness of a base plate or the actual requirements to meet the machining requirements for different specifications.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser cutting method and device for an optical filter. Background technique [0002] As an optical element that can pass or cut off specific wavelengths, the optical filter is a key functional component in the fields of aerospace precision remote sensing, optical communication, and high-performance cameras. It can achieve higher precision and sensitivity detection and high quality Information transfer. For example, in order to achieve multi-band detection in the aerospace field and suppress infrared background radiation, multiple infrared filter groups with specific band ranges will be installed in the multi-band infrared visual detection device used; in the transceiver module of optical communication devices, By selecting the signal of the required wavelength, the communication quality can be significantly improved, and the noise interference in the transmission proc...

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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a laser cutting method and device for optical filters, thereby overcoming the problem of poor cutting quality of existing optical filter cutting methods

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