Design method of a two-piece linear dispersion combined prism spectroscopic device
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A design method, prism splitting technology, applied in the field of spectrum analysis and spectrum detection, to achieve the effect of scientific design method
Active Publication Date: 2019-07-23
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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How to meet the needs of spectral analysis, detection and imaging systems for linear dispersion prisms, and overcome the inability of existing technologies to scientifically and quantitatively guide the design and engineering application of linear dispersion combined prisms are the technical problems to be solved by the present invention
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Embodiment 1
[0048] Embodiment 1: Linear dispersion combined prism spectroscopic device for visible and near-infrared bands
[0049] The present invention adopts following materials:
[0050] 1. Upper prism 1: Material H-ZK1.
[0051] 2. Lower prism 2: Material H-BaK1.
[0052] The main working principle of the present invention is as image 3 Expressed by:
[0055] 2. Select the attached manual image 3 In the configuration shown, the relationship between the refractive index and the wavelength of the two materials is substituted into formula (2), and the shape parameters of the upper and lower prisms stipulated in formula (5), and the incident angle of light are respectively α 1 = 30°, β 1 = 75°, γ 1 = 75°, α 2 = 30°, β 2 = 75°, γ 2 =75°, i 1 = 39°.
[0056] 3.360nm-1000nm broad-band parallel light is incident on the combined prism at an angle of...
Embodiment 2
[0057] Embodiment 2: Linear dispersion combined prism spectroscopic device for short-wave infrared band
[0058] The present invention adopts following main devices:
[0059] 1. Upper prism 1: Material H-ZK5
[0060] 2. Lower prism 2: Material H-BaK3
[0061] The main working principle of the present invention is as figure 2 Expressed by:
[0064] 2. Select the attached manual figure 2 In the configuration shown, the relationship between the refractive index and the wavelength of the two materials is substituted into the formula (2), and the shape parameters of the left and right prisms stipulated in the formula (5), and the incident angle of the light are respectively α 1 = 56°, β 1 = 50°, γ 1 =74°, α 2 = 30°, β 2 =113°, γ 2 = 37°, i 1 = 25°
[0065] 3.360nm-1000nm broad-band parallel light is incident on the combination prism at an ...
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Abstract
The invention discloses a design method for a combined two-piece linear dispersionprism light splitter. The prism light splitter is designed by combining two prisms which have special materials and special shape parameters and is especially applicable to spectrum analysis, spectrum detection and related fields. According to the method, based on a control variable method and the linear programming theory, non-linear dispersion of the second prism is utilized to compensate non-linear dispersion of the first prism through controlling light spreading directions and the shapes of the prisms according to dispersion characteristics of the materials of the first prism, and the combined linear dispersion prism light splitter is acquired. The combined prism is advantaged in that a non-linear dispersion disadvantage of a single prism is solved, and properties of wide free spectrum scope, high luminous energyutilization rate, good versatility, simple structure and low cost are all realized.
Description
[0001] A linear dispersion combined prism spectroscopic device is composed of two prisms with specially selected materials and specially designed shapes, and is especially suitable for spectrum analysis, spectrum detection and related fields. The invention is based on the control variable method and linear programming theory, and according to the dispersion characteristics of the first prism material, by controlling the propagation direction of light and the shape of the prism, the nonlinear dispersion of the second prism is used to control the nonlinear dispersion of the first prism. Compensation is performed to obtain a linear dispersion combined prism light splitting device. The combined prism overcomes the defect of dispersion and nonlinearity of a single prism, and has the advantages of wide free spectral range, high utilization rate of light energy, good versatility, simple structure, low price and the like. Background technique [0002] As a traditional spectroscopic de...
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IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 何志平杨秋杰秦侠格徐映宇舒嵘
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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