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Wide spectrum laser beam divergence angle measurement system

A measurement system, laser beam technology, applied in measurement devices, optical devices, instruments, etc., can solve problems such as low accuracy

Inactive Publication Date: 2013-08-14
CHANGCHUN UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The measurement methods used by existing laser beam divergence devices mainly include focal spot method, focal knife-edge method, BBO crystal frequency doubling method and punching method, etc., which have low precision and can only measure the laser beam divergence angle of a single wavelength.

Method used

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  • Wide spectrum laser beam divergence angle measurement system

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Embodiment Construction

[0011] A wide-spectrum laser beam divergence measurement system, such as figure 1 As shown, the system consists of a measured laser 1, a laser imaging optical system 2, a constant ratio attenuation plate component 3, a visible light band laser beam divergence measurement component 4, a near-infrared band laser beam divergence measurement component 5 and a data processing terminal 6 Wherein, the focal length of the laser imaging optical system 2 at different wavelengths is calculated by ZEMAX; the fixed-ratio attenuation plate assembly 3 is composed of four sets of attenuation plates with attenuation magnifications of 10dB, 20dB, 30dB and 40dB, and is arranged in the laser imaging optical system 2 and the first dichroic prism 41; the visible light band laser beam divergence angle measurement component 4 is composed of the first dichroic prism 41, the first continuous attenuator 42 and the visible light CCD camera 43, and the visible light CCD camera 43 has a spectral response ra...

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Abstract

The invention relates to a wide spectrum laser beam divergence angle measurement system, which belongs to the technical field of electro-optical measurement. According to the wide spectrum laser beam divergence angle measurement system, a visible light charge-coupled device (CCD) camera and a near-infrared CCD camera collect laser spot images from each of spectral response ranges and transmit thecollected images to a data processing terminal. The data processing terminal subjects the laser spot images to calculation processing and sends out far-field beam divergence angles of incident laser in the horizontal direction and in the vertical direction. The laser beam divergence angle with any wavelength can be measured in spectral ranges between 400 nanometers and 1700 nanometers, the measurement ranges is from 0.1 megarad to 5 megarad, and the measurement accuracy can reach 0.02 megarad.

Description

technical field [0001] The invention relates to a wide-spectrum laser beam divergence angle measurement system, which belongs to the technical field of photoelectric measurement. Background technique [0002] Because of the characteristics of good monochromaticity, strong directionality, high brightness and small divergence angle, laser has attracted extensive attention of researchers. With the continuous development of laser technology, laser has been widely used in various fields of production, life and military warfare. In various applications, it is necessary to test various parameters of the laser beam, among which the divergence angle of the laser beam is an important parameter of the laser beam. It not only reflects the divergence characteristics of the long-distance transmission, but also can evaluate the laser equipment more objectively. Therefore, it is very necessary to accurately measure the divergence angle of the laser beam. The measurement methods used in ex...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/26
Inventor 杨进华姜会林王菲韩文波韩福利王春艳
Owner CHANGCHUN UNIV OF SCI & TECH