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Semitransparent medium radiation characteristic measuring method based on pulse laser irradiation

A semi-transparent medium and pulsed laser technology, which is applied to the measurement of scattering characteristics, color/spectral characteristics, transmittance, etc., can solve the problems of complex measurement methods, poor accuracy, and slow speed, and achieve low cost and high precision of measurement methods. Effect of improvement, speed improvement

Active Publication Date: 2013-12-25
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problems of complex measurement method, slow speed and poor accuracy in the existing method of measuring radiation parameters of translucent media based on the measurement of transmitted and reflected radiation signals, the present invention proposes the measurement of radiation characteristics of semi-transparent media based on pulsed laser irradiation method

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  • Semitransparent medium radiation characteristic measuring method based on pulse laser irradiation
  • Semitransparent medium radiation characteristic measuring method based on pulse laser irradiation
  • Semitransparent medium radiation characteristic measuring method based on pulse laser irradiation

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specific Embodiment approach 1

[0016] Specific implementation mode 1. Combination figure 1 This embodiment is specifically described. The method for measuring radiation characteristics of a semi-transparent medium based on pulsed laser irradiation described in this embodiment includes the following steps:

[0017] Step 1. Make the translucent medium to be tested into a flat test piece with a thickness of L, and evenly coat the black body coating on both sides of the test piece in the thickness direction, align the pulsed laser light source with the left center of the test piece, and The direction of the laser light source is perpendicular to the surface of the test piece, and two thermocouple probes 2 are respectively fixed on the left and right sides of the test piece, and the two thermocouple probes 2 are connected to the thermocouple thermometer 3;

[0018] Step 2: Turn on the laser, make the pulse laser light source irradiate a pulse on the left surface of the test piece, and then turn off the laser; at...

specific Embodiment approach 2

[0032] Embodiment 2. The difference between this embodiment and the method for measuring radiation characteristics of semi-transparent media based on pulsed laser irradiation described in Embodiment 1 is that the inverse problem algorithm described in step 3 uses a mixture of simplex-backbone particle swarms (SM-BBPSO) algorithm implementation.

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Abstract

The invention relates to a semitransparent medium radiation characteristic measuring method based on pulse laser irradiation. The problem that an existing semitransparent medium radiation parameter measuring method based on transmission and reflection radiation signal measuring is complex, low in speed and bad in accuracy is solved. A laser light source irradiates the surface of one side of a semitransparent medium to be measured, black body coating layers are evenly arranged on the two sides of the semitransparent medium to be measured in a coating mode, and on the surface of one side of the semitransparent medium with the black body coating layers evenly coated, a thermocouple thermodetector is used for measuring and recording changing of temperature of the two surfaces of the medium along with time. According to the temperature on the two sides changing along with time, and the absorbing coefficient and the scattering coefficient of the semitransparent medium to be measured are obtained through an inverse problem algorithm. The semitransparent medium radiation characteristic measuring method is suitable for a plurality of fields such as aerospace, military, energy, chemical engineering, biology medical treatment and atmospheric sciences.

Description

technical field [0001] The invention relates to the technical field of optical parameter measurement of translucent media. Background technique [0002] A medium is called a translucent medium if its spectral optical thickness is almost finite in one or several wavelength ranges. Translucent media are widely used in many fields such as aerospace, military, energy, chemical industry, biomedicine, and atmospheric science. Typical applications include: manufacturing of ceramic parts for aircraft and automotive engines, ceramic thermal insulation for turbine engines, Thermal insulation of space optical systems, fabrication of optical fibers and optical components, ignition of translucent plastics, etc. [0003] Absorption coefficient and scattering coefficient are important parameters to characterize the radiative transmission properties of translucent media. The research on the experimental measurement methods of the absorption coefficient and scattering coefficient of semi-t...

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Application Information

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IPC IPC(8): G01N21/49G01N21/59G01N21/31
Inventor 齐宏牛春洋任亚涛阮立明
Owner HARBIN INST OF TECH
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