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Laser energy meter probe

A laser energy meter, laser technology, applied in the direction of optical radiation measurement, measuring device, photometry, etc., can solve the problems of thick absorber, low accuracy, low heat transfer coefficient, etc., to reduce the loss of temperature, Improved accuracy, thermal equilibration time and less temperature loss effect

Active Publication Date: 2015-09-23
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-caliber laser energy meters, the thickness of the absorber is relatively thick, and the heat transfer coefficient is low. It takes a long time for the heat to transfer from the front surface of the absorber to the rear surface. On the other hand, a single absorber is used The temperature of the front surface is the highest, and the energy dissipated by convective heat transfer on the front surface is very high during the measurement process, which leads to the deviation between the laser energy measured by the laser energy meter and the actual one, and the accuracy is not high

Method used

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Examples

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Embodiment 1

[0029] Such as figure 1 As shown, a laser energy meter probe includes an absorber 1. The absorber 1 includes a first absorber 11, a second absorber 12, and a third absorber 13. According to the laser transmission direction, the first absorber 11 , The second absorbent sheet 12 and the third absorbent sheet 13 are arranged in sequence, and the first absorbent sheet 11, the second absorbent sheet 12 and the third absorbent sheet 13 are connected as a whole by a hot key and the surface of the hot key and The largest surface of the first absorbing sheet 11, the second absorbing sheet 12, or the third absorbing sheet 13, the absorption coefficient of the first absorbing sheet 11<the absorption coefficient of the second absorbing sheet 12<the absorption of the third absorbing sheet 13 The absorber 1 of the present invention is formed by thermal bonding of three absorber sheets, and the absorption coefficient of the absorber sheet 1 has a gradient to ensure that the laser energy tends ...

Embodiment 2

[0035] The parts in this embodiment that are the same as those in the first embodiment will not be repeated, the difference is:

[0036] Such as image 3 As shown, the cross section of the tooth structure 15 is an isosceles triangle and a right triangle, the absorption coefficient of the first absorbent sheet 11 is 166 / m, the absorption coefficient of the second absorbent sheet 12 is 298 / m, and the third The absorption coefficient of the absorbent sheet 13 is 1466 / m.

Embodiment 3

[0038] The parts in this embodiment that are the same as those in the first embodiment will not be repeated, the difference is:

[0039] The cross section of the tooth-shaped structure 15 is an isosceles triangle, the absorption coefficient of the first absorbent sheet 11 is 241 / m, the absorption coefficient of the second absorbent sheet 12 is 399 / m, and the absorption coefficient of the third absorbent sheet 13 It is 1497 / m.

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Abstract

The invention discloses a laser energy meter probe, which comprises an absorber, and is characterized in that the absorber comprises a first absorbing sheet, a second absorbing sheet and a third absorbing sheet, wherein the first absorbing sheet, the second absorbing sheet and the third absorbing sheet are sequentially arranged according to the laser transmission direction, the first absorbing sheet, the second absorbing sheet and the third absorbing sheet are integrally connected through thermal bonding, the thermal bonding surface is the largest surface of the first absorbing sheet, the second absorbing sheet or the third absorbing sheet, an absorption coefficient of the first absorbing sheet is less than an absorption coefficient of the second absorbing sheet, and the absorption coefficient of the second absorbing sheet is less than an absorption coefficient of the third absorbing sheet. The absorber of the laser energy meter probe is used for absorbing laser energy in a gradient manner, the thermal equilibrium time and energy loss during the measurement process are reduced, and the measurement accuracy of the laser energy meter is significantly improved.

Description

Technical field [0001] The invention relates to the technical field of laser energy measurement, in particular to a laser energy meter probe. Background technique [0002] High-power solid-state laser systems require accurate measurement of large-aperture laser energy, as well as electrical calibration capabilities. The traditional laser energy measurement method uses a piece of neutral dark glass with a single absorption coefficient as the absorber to absorb the laser energy, which becomes an increase in its own temperature. The temperature of the absorber is homogenized in the horizontal direction through the heat homogenizer, and finally , Use the sensor to measure the value of the temperature rise, so as to realize the measurement of laser energy. For large-aperture laser energy meters, the absorber is thicker and the heat transfer coefficient is low. It takes a long time for heat to transfer from the front surface of the absorber to the back surface. On the other hand, a si...

Claims

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Application Information

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IPC IPC(8): G01J1/00G01J1/04
Inventor 唐菱夏衍文陈骥汪凌芳党钊王超王方李克洪周维谢旭东彭志涛胡东霞朱启华
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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