Schlieren device used for test on high power laser far-field focal spot

A far-field focal spot, high-power technology, applied in the optical field, can solve problems such as image sensor damage, and achieve the effect of reliable sealing and easy clamping and installation

Active Publication Date: 2012-06-06
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring the side lobe, the main lobe needs to be blocked, otherwise it will cause damage to the image sensor. The device that blocks the main braid is a schlieren device. The requirements for this device are strict light blocking, laser radiation resistance, and no damage to the measurement Cause additional impact, there is no such device yet

Method used

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  • Schlieren device used for test on high power laser far-field focal spot
  • Schlieren device used for test on high power laser far-field focal spot
  • Schlieren device used for test on high power laser far-field focal spot

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Embodiment Construction

[0020] see figure 2 , image 3 and Figure 4 , the present invention provides a high-power laser far-field focal spot test schlieren device, its overall structural shape is circular, including a light shield 1, an upper glass press 2, a lower glass press 3, and silica gel.

[0021] The upper glass pressing piece 2 and the lower glass pressing piece 3 form a light-transmitting cover, the upper glass pressing piece 2 and the lower glass pressing piece 3 are fastened together, and the light-transmitting cover is arranged on the outside of the light-shielding plate 1, for better use effect, After the upper glass pressing piece 2 and the lower glass pressing piece 3 are snapped together, it is sealed by a sealing member 4, and the sealing member 4 can be silica gel, glass glue and the like.

[0022] The light blocking sheet 1 can have a transmittance not greater than 10 -5 And the radiation resistance threshold is not less than 20J / cm 2 The light blocking sheet, the light bloc...

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Abstract

The invention relates to a schlieren device used for a test on a high power laser far-field focal spot. The device comprises a light blocking sheet and a light transmission cover that is arranged outside the light blocking sheet. According to the invention, the schlieren device used for a test on a high power laser far-field focal spot is provided. The device has a good light blocking effect and a laser irradiation resistant performance; and there is no influence on measurement.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a schlieren device, in particular to a schlieren device for high-power laser far-field focal spot testing. Background technique [0002] The far-field focal spot is an important index to characterize the beam quality of a high-power laser system. It is also an intuitive parameter to measure the intensity distribution of the laser-targeted focal spot. In particular, the size and energy distribution of the side braids of the focal spot need to be accurately measured. Due to the wide dynamic range of the far-field focal spot (above 10000:1), there is no measurement sensor with such a large dynamic range. A focal spot measurement method is to measure the main lobe and side lobe of the focal spot separately, and obtain The complete focal spot morphology, this method is called the schlieren method, such as figure 1 shown. When measuring the side lobe, the main lobe needs to be blocked, otherwise ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/04
Inventor 达争尚李红光董晓娜孙策
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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