Method and system for performing laser cutting on light filter plate

Abstract

The invention provides a method and a system for performing laser cutting on a light filter plate. The method comprises the following steps of: adhering the light filter plate on a spreading film; focusing laser emitted by a picoseconds laser unit inside the light filter plate by a light focusing element to form bursting points inside the light filter plate; and driving the light filter plate to move along a preset path through a motion platform, and forming a bursting zone inside the light filter plate by the bursting points; uniformly stretching and spreading the film, and separating the light filter plate along the bursting zone. According to the method provided by the invention, focused laser spots are relatively small, and therefore, the width of the formed bursting zone, namely a cutting channel is relatively small, loss of materials can be reduced, and the strip yield is increased; and moreover, the distance from the bursting zone to the first surface and the distance from the bursting zone to the second surface are greater than or equal to a first preset value, and therefore, an antireflection film on the surface is not damaged; besides, the film uniformly stretches and spreads, so that the bursting zone inside the light filter plate spreads towards upper and lower surfaces to realize plate splitting and separating, and therefore, the fracture surface of the light filter plate is uniform without taper.

Description

technical field [0001] The present invention relates to the technical field of laser cutting, in particular to a method and system for laser cutting optical filters. Background technique [0002] Most of the existing mobile phone cameras use blue glass filters to absorb infrared light to filter out the infrared light in the visible light entering the lens, so as to prevent the infrared light from affecting the quality of the captured image. Furthermore, in order to increase the light transmittance of the blue glass filter and improve the brightness of the captured image, an anti-reflection film is also attached to the surface of the filter in the prior art. [0003] Before applying the above-mentioned optical filter to the mobile phone camera, the optical filter needs to be cut so that the size of the optical filter can meet the requirements of the camera. The prior art discloses a method of cutting an optical filter attached with an anti-reflection film by using a laser. H...

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Problems solved by technology

[0004] In view of this, the present invention provides a method and system for laser cutting optical filters to solve the problems in the prior art that the anti-reflection coating on the surface of the optical filter is damaged and the cutting channel is wide due to the large laser focus spot

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