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Method for synchronous measurement of absorption loss and surface thermal deformation amount of optical element

A technology of optical components and thermal deformation, which is used in testing optical properties, measuring devices, optical instrument testing, etc. It can solve the problem of low sensitivity, and achieve the effects of high sensitivity, cost saving, and improved measurement accuracy.

Inactive Publication Date: 2007-05-30
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

Both measurement methods are not very sensitive
At present, there is no technology and method report that can simultaneously measure the absorption loss and surface thermal deformation of optical components

Method used

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  • Method for synchronous measurement of absorption loss and surface thermal deformation amount of optical element
  • Method for synchronous measurement of absorption loss and surface thermal deformation amount of optical element
  • Method for synchronous measurement of absorption loss and surface thermal deformation amount of optical element

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Embodiment Construction

[0020] As shown in Figure 1, the measuring device adopted in the present invention consists of a heating laser light source 1, an optical chopper or an acousto-optic modulator 2, a focusing lens 3, an electric optical shutter 4, a laser power meter 5, a detection laser light source 6, and a mirror 7. Insulated sample chamber 8, tested sample fixture and tested sample 9, reference sample fixture and reference sample 10, sensitive temperature detection unit 11, bridge amplifier circuit 12, photodetector 13, aperture diaphragm 14, A / D converter 15, digital voltmeter or oscilloscope 16, lock-in amplifier 17, computer 18, mirror 19 and light absorber 20; the output beam of heating laser light source 1 is modulated by chopper or acousto-optic modulator 2 light intensity Focused by the lens 3 onto the surface of the measured optical element 9 placed in the adiabatic sample chamber 8 . The power of the heating laser beam is reflected by the motorized optical shutter 4 to the laser po...

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Abstract

A method for detecting absorption loss of optical element and surface hot deformation is disclosed, characterized in that: it adopts the union technique of laser calorimeter and surface thermal lens to detect the absolute value of absorption loss of optical element and the surface hot deformation at the same time, it can monitor the real time change of the absorption loss of optical element during the course of laser irradiation. The value of absorption loss is obtained by measuring the change of temperature of the optical element during the course of laser irradiation, and the surface hot deformation is obtained by detecting the amplitude of variation of detecting laser beam intensity caused by surface hot deformation which is caused by absorbing the energy of heating laser beam, the real time change of the absorption loss and the stability of optical elements could be detected by monitoring the real time change of central intensity of the detecting laser beam.

Description

technical field [0001] The invention relates to a method for measuring parameters of an optical element, especially a method for simultaneously measuring absorption loss and surface thermal deformation. Background technique [0002] In high-power laser technology and its applications, the absorption loss of optical components and the resulting thermal deformation of the surface are important technical parameters of optical components. The absorption loss directly determines the damage threshold of the optical element, which limits the laser power and laser energy that the laser and the laser system can withstand. The thermal deformation of the surface of the optical element caused by absorption will lead to the deterioration of the beam quality of the laser beam, which limits the high Fields of application of power laser technology. Therefore, in order to develop high-power laser optical components with low absorption loss and low thermal distortion (surface thermal deforma...

Claims

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Application Information

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IPC IPC(8): G01M11/00G01M11/02G01M11/08
Inventor 李斌成
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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