Method for measuring large power CO2 laser divergence angle

Abstract

The invention discloses a method for measuring a large power CO2 laser divergence angle, and belongs to the large power CO2 laser technology field. In order to solve the problem of measuring the large power CO2 laser divergence angle accurately in prior art, a large power CO2 laser to be measured is fixed; a diffuse reflection board is arranged vertical to the direction of an optical axis of the laser to be measured to make a laser light spot at the center of the diffuse reflection board; four black bodies are arranged at the four drift angles of the diffuse reflection boards to keep the diffuse reflection board powered on and make the black bodies hot; then, an infrared imaging device is installed in a way that a certain angle is formed between the infrared imaging device and the incidence plane of the diffuse reflection board and the distance is the focal length of the infrared imaging device; finally, the infrared imaging device is connected with a computer; the large power CO2 laser to be measured emits laser continuously; then, the infrared imaging device is closed; the laser emission is stopped, at the same time, the infrared imaging device is started; the image generated after the diffuse reflection board being irradiated by the laser is collected; the image data is transmitted to the computer; and the laser divergence angle of the large power CO2 laser is calculated by the computer.

Description

technical field [0001] The invention relates to a method for measuring high-power CO 2 The method of laser divergence angle belongs to high power CO 2 field of laser technology. Background technique [0002] high power CO 2 Lasers are widely used in many fields such as industry, medical treatment, military and scientific research. In recent years, high-power CO 2 Laser far-field applications are developing rapidly, and the distribution of far-field spots directly determines the effect of laser. The far-field spot is affected by the laser divergence angle, so the laser divergence angle is an important indicator to measure the effect of the laser. The intuitive manifestation of the laser divergence angle is the change of the laser spot size due to the change of the laser transmission distance. To measure the laser divergence angle, the laser spot size must be accurately obtained. [0003] The spot ablation method is a relatively common high-power laser divergence angle ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing measurement method cannot accurately measure high-power CO 2 To solve the problem of laser divergence angle, provide a method based on infrared imaging to identify laser spots to measure high-power CO 2 Laser Divergence Method

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