Energy compensation process for laser inside-carving

Abstract

The invention relates to an energy compensation method used for laser engraving. The method comprises the steps of supplying a laser with a Q switch, calculating out the needed energy value of the scan central point and the needed energy value of the point farthermost from the central point when conducting laser engraving; establishing the function of displacement and needed energy between the displacement from the central point and the needed energy value; establishing function between the displacement from the scan central point and the establishment time according to the establishment timeof the reproduced pulse of the laser and the needed energy, and conducting energy compensation to scan points in different positions through the Q adjustment by the Q switch according to the functionbetween the displacement from the scan central point and the establishment time, changing the Q adjustment pulse width frequency and the pulse width through adjusting Q by the Q switch and increasingenergy compensation, so as to conveniently and effectively carry out compensation to the energy loss of different scan points, thereby ensuring that the burst and lighting degree of the entire scan range reaches a uniform level and relative uniform engraving effect can be achieved in the entire scan range.

Description

technical field [0001] The invention relates to an energy compensation method, in particular to an energy compensation method for laser internal engraving. Background technique [0002] Laser engraving technology is to focus the pulsed intense laser inside a transparent body (such as crystal, glass, acrylic, etc.) The three-dimensional arrangement constitutes a three-dimensional image, and the microcrack is a catastrophic damage caused by the nonlinear interaction between the fundamental frequency or double frequency of the nanosecond laser and the transparent body. [0003] The laser engraving machine first converts the two-dimensional or three-dimensional image / portrait into a point cloud image through the special point cloud conversion software, and then controls the position of the crystal and the output of the laser through the laser control software according to the arrangement of the points. At a specific position, the control program in the controller of the laser e...

AI Technical Summary

Problems solved by technology

[0008] The galvanometer laser engraving machine uses the deflection of the galvanometer to make the laser beam incident from different angles to complete the entire scanning process. The incident angle of the incident laser beam is different when scanning different areas, and the area of ​​the focal spot of the incident laser beam in the transparent body is different. Influenced by factors such as different penetration depths of the incident laser beam in the transparent body, the degree of energy loss is inconsistent, and practice shows that the same single pulse energy is at different positions from the center of the scanning area, and the blasting point shape inside the transparent body is also different. Not the same, and form the effect that the engraving becomes lighter the farther away from the center of the scanning area, causing the pattern to appear hazy and unclear