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Method for calculating reflectivity and transmissivity spectrums of binary laminated optical material

A technology of optical materials, computational methods, applied in the field of spectroscopy

Active Publication Date: 2017-05-17
TIANJIN JINHANG INST OF TECH PHYSICS
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Problems solved by technology

[0005] The present invention proposes a calculation method for the reflectivity and transmittance spectrum of binary laminated optical materials to solve the problem of how to determine the transmission and reflection spectrum characteristics of binary laminated optical materials

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  • Method for calculating reflectivity and transmissivity spectrums of binary laminated optical material
  • Method for calculating reflectivity and transmissivity spectrums of binary laminated optical material
  • Method for calculating reflectivity and transmissivity spectrums of binary laminated optical material

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Embodiment

[0107] The binary laminated optical material chooses ZnS / ZnSe laminated optical material. Thickness d of ZnS X 1mm, the thickness d of ZnSe Y The calculation wavelength range is 3μm-14μm, and the calculation step size is 0.005μm. The angle of incidence is 0°. Calculate the reflectance and transmittance of ZnS / ZnSe laminated optical materials. Determine the refractive index and extinction coefficient of ZnS and ZnSe according to Figure (4) and Figure (5), respectively.

[0108] 1. According to formulas (1) to (4), calculate and construct the reflectance spectra of the three interfaces in the ZnS / ZnSe laminated optical material. Calculated as Figure 6 shown. According to the transmittance T of the first interface 1 =1-R 1 ;Transmittance T of the second interface 2 =1-R 2 ; Transmittance T of the third interface 3 =1-R 3 , calculate and construct the transmittance spectra of the three interfaces.

[0109] 2. According to the formulas (1) and (5)-(9), calculate and c...

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Abstract

The invention belongs to the field of spectrums, particularly relates to a method for calculating spectral characteristics of a binary laminated optical material, and in particular relates to a method for calculating reflectivity and transmissivity spectrums of a ZnS / ZnSe laminated infrared optical material. A transmission / reflection spectrum of an optical wave after passing through the binary laminated material is obtained by building a physical model of light transmitted in the axial direction of the laminated material and an optical noncoherent transmission theory; and a physical relationship between the basic physical properties and physical thicknesses of ZnS and ZnSe and transmission / reflection spectral characteristics is built. The method has universality on spectral calculation of the binary laminated material, and a theoretical basis is provided for optical wave energy modulation characteristics of the binary laminated material.

Description

technical field [0001] The invention belongs to the field of spectroscopy, and in particular relates to a calculation method for the spectral characteristics of a binary laminated optical material, in particular to a calculation method for the reflectivity and transmittance spectrum of a ZnS / ZnSe laminated infrared optical material. Background technique [0002] ZnS and ZnSe materials are two important infrared optical materials, which are widely used in various infrared photoelectric imaging and photodetection systems. According to different preparation techniques, the transparent area of ​​hot-pressed ZnS material and CVD ZnS material is in the 1 μm ~ 13 μm band, the transparent area of ​​multispectral ZnS is 0.35 μm ~ 13 μm; the transparent area of ​​hot pressed ZnSe material is in the 1 μm ~ 20 μm band, The transparent area of ​​the CVD ZnSe material can be extended to 0.5 μm to 20 μm. With the development of modern infrared multi-spectral imaging and photoelectric dete...

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Application Information

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IPC IPC(8): G01N21/25G01N21/55G01N21/59
CPCG01N21/25G01N21/55G01N21/59G01N2021/558
Inventor 刘华松季一勤刘丹丹王利栓姜玉刚
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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