A Method of Measuring the Divergence Angle of High Power Co2 Laser
A high-power, divergence-angle technology, applied in the direction of testing optical properties, can solve problems such as the inability to accurately measure the divergence angle of high-power lasers, and achieve the effects of avoiding damage, simple test equipment, and accurate measurement results
Active Publication Date: 2018-06-29
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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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Embodiment
[0028] Will be tested high-power CO 2 The laser 4 is fixed, along the direction of the optical axis in the same direction as the high-power CO to be measured 2 The diffuse reflection plate 1 is fixed at a distance of 70m from the laser 4. According to the theoretically calculated divergence angle and the diameter of the laser exit spot, the laser spot formed after the laser transmits this distance can all fall in the diffuse reflection plate 1, and the diffuse reflection plate is blocked by a refractory material. 1 and pre-receive the laser spot, adjust the height of the diffuse reflection plate 1 according to the received laser spot position, so that the laser spot position is in the center of the diffuse reflection plate 1.
[0029] Place the infrared imaging device 2 (the focal length of the infrared imaging device is 15m) at 15° away from the optical axis of the laser and at a distance of 15m from the diffuse reflection plate 1, and fine-tune the infrared imaging device 2 ...
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A method for measuring the divergence angle of high-power CO2 laser belongs to the technical field of high-power CO2 laser. Place the diffuse reflection plate vertically in the direction of the optical axis, so that the laser spot is located in the center of the diffuse reflection plate, and there are four black bodies at the four corners of the diffuse reflection plate, keep the diffuse reflection plate electrified, and the black bodies generate heat; then, install infrared imaging equipment, so that It forms a certain angle with the incident surface of the diffuse reflection plate, and the distance is the focal length of the infrared imaging device; finally, the infrared imaging device is connected to the computer; the high-power CO2 laser to be tested continues to emit laser light, and the infrared imaging device is turned off at this time; stop emitting the laser, At the same time, turn on the infrared imaging device, collect the image generated after the laser irradiates the diffuse reflection plate, and transmit the image data to the computer, and the computer calculates the laser divergence angle of the high-power CO2 laser.
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 ...
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IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 张阔陈飞杨贵龙邵春雷郭劲
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI