Device and method for carrying out laser machining on light guide board inside glass

Abstract

The invention relates to a device and method for carrying out laser machining on a light guide board inside glass. A beam expander, a 45-degree total reflection mirror set, a beam shaping unit and a scanning galvanometer are arranged on a light path of the output end of a laser in sequence. The beam output end of the scanning galvanometer right faces a carrier platform. A CCD system is installed on the scanning galvanometer. A lens of the CCD system right faces the carrier platform. Laser beams emitted by the laser are coaxially expanded through the beam expander, the beam transmission divergence angle is improved, the light path is made to be aligned, and the light spot is smaller after focusing is carried out by coaxially expanding the laser beams; the expanded beams reach the 45-degree total reflection mirror set and enter the beam shaping unit, the shaped focusing light spot can be of a three-dimensional microstructure inside the glass, the shaped beams reach the scanning galvanometer, laser beams emitted by the scanning galvanometer are focused inside the glass serving as a workpiece to be machined, and marks are etched inside the glass. The device is high in light transmittance, wide in application range, long in service life, not prone to abrasion and accurate in machining position.

Description

technical field [0001] The invention relates to a device and method for processing a light guide plate inside glass by laser. Background technique [0002] The design principle of the light guide plate is derived from the liquid crystal display screen of the notebook computer. It is a high-tech product that transforms the linear light source into a surface light source. Using the backlight module technology of LCD display screen and notebook computer, through the high light transmittance of the light guide point, the light guide point is calculated by the computer, so that the light of the light guide plate is refracted into a uniform light state of the surface light source and manufactured. The product adopts the principle of spectral analysis combined with digital UV printing technology and is produced under constant temperature, constant humidity and dust-free environmental conditions. It has distinctive features such as ultra-thin, ultra-bright, uniform light guide, ene...

AI Technical Summary

Problems solved by technology

[0003] However, the material of light guide plates on the market is generally acrylic as the base material. Relatively speaking, the light transmittance of acrylic is lower than that of glass. At the same time, acrylic is a flexible material, and its heat resistance is much worse than that of glass, and its environmental adaptability is poor; If glass is used as the base material, it can increase light transmittance, increase light source conversion efficiency, improve energy saving effect, and greatly increase service life. At the same time, it can be widely used in high-tech fields such as "luminous glass windows"

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