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Translucent material absorption coefficient measuring method based on fourier transform infrared spectrum analyzer
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An infrared spectrum analysis and Fourier transform technology, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of complicated operation and slow measurement speed, and achieve the effect of simple operation and fast measurement speed.
Active Publication Date: 2013-10-09
HARBIN INST OF TECH
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[0004] In order to solve the problems of complex operation and slow measurement speed in the existing method for measuring the absorption coefficient of translucent materials, the present invention proposes a method for measuring the absorption coefficient of translucent materials based on a Fourier transform infrared spectrometer
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specific Embodiment approach 1
[0016] Specific implementation mode 1. Combination figure 1 Illustrate this embodiment, the translucent material absorption coefficient measuring method based on Fourier transform infrared spectrometer described in this embodiment, it is realized based on Fourier transform infrared spectrometer; It is realized based on Fourier transform infrared spectrometer; The spectrum analyzer includes: power supply 1, interferometer 2, light source 3, measurement chamber 4, total reflection mirror (5) and detector 6; interferometer 2 includes No. 1 total reflection mirror 2-1 and No. 2 total reflection mirror 2 -2, half mirror 2-3, lens 2-4 and No. three total mirror 2-5; the light beam that light source 3 sends sends to the half mirror 2-3 of interferometer 2, through half mirror 2 Reflected light beam after -3 is reflected back to half mirror 2-3 after No. 1 total mirror 2-1, is incident to lens 2-4 after half mirror 2-3 transmits, through half mirror 2- 3. The transmitted light beam a...
specific Embodiment approach 2
[0024] Specific embodiment two, this embodiment is a further description of the method for measuring the absorption coefficient of translucent materials based on the Fourier transform infrared spectrometer described in specific embodiment one, the spectral transmittance τ of the test piece 5 described in step two λ The pass formula:
[0025] τ λ = I λ , L I λ - - - ( 1 )
[0026] obtained; among them, I λ,L is the energy finally detected by the detector after the absorption of the specimen,
[0027] I λ,L =I λ,0 exp(-k aλ L) (2)
[0028] In the formula, L is the thickness of the specimen, I λ,0 is the spectral radiant energy of the beam entering the specimen;
[0029] I λ,0 =(1-ρ λ )I λ (3).
specific Embodiment approach 3
[0030] Specific embodiment three. This embodiment is a further description of the method for measuring the absorption coefficient of a translucent material based on a Fourier transform infrared spectrometer described in specific embodiment one. The test piece is obtained by calculating according to Bell's law as described in step three. The spectral absorption coefficient k of the material aλ The formula is:
[0032] In the formula, L is the thickness of the specimen.
[0033] In this embodiment, Formula 1 and Formula 2 are substituted into F...
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Abstract
A translucent material absorption coefficient measuring method based on a fourier transforminfraredspectrum analyzer relates to the field of measuring the material thermophysical property, and particularly relates to a translucent material absorption coefficient measuring method. The translucent material absorption coefficient measuring method aims at solving the problems that the existing translucent material absorption coefficient measuring method is complicated to operate and slow in measuring speed. The translucent material absorption coefficient measuring method is realized on the basis of the fourier transforminfraredspectrum analyzer. The spectral absorption coefficient ka <gama> of a test piece material can be obtained by calculating according to the beer law by utilizing the spectrum transmittance t<gama> of a test piece and the reflectivity p<gama> of the test piece material, the Planck mean absorption coefficient kap and the rosseland mean absorption coefficient kaR can be obtained as the measurement results of the translucent material absorption coefficient to complete the measurement of the fourier-transform-infrared-spectrum-analyzer-based translucent material absorption coefficient by integrating a whole spectrum by utilizing the spectrum absorption coefficient ka<gama> of the test piece material. The translucent material absorption coefficient measuring method is applicable to measurement of the translucent material absorption coefficient.
Description
technical field [0001] The invention relates to the field of measuring thermophysical properties of materials, in particular to a method for measuring the absorption coefficient of translucent materials. Background technique [0002] The absorption coefficient is a physical quantity that characterizes the ability of the absorbing medium to absorb radiation energy along the process, and is an extremely important physical parameter in the field of optical and infrared radiation transmission. [0003] The measurement of absorption coefficient involves many fields such as aerospace, military, energy, chemical industry, biomedicine and atmospheric science. Its typical applications include: optimal design of aerospace vehicle optical windows, thickness detection of translucent thermal controlcoating materials, optical crystal growth , the melting and solidification of reactor uranium fuel, the melting and solidification of phase change materials in high-temperature thermal energy...
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