High resolution spectrometer and optical calibrating method thereof

A high-resolution, spectrometer technology, applied in the field of spectral analysis equipment, can solve problems such as spectral order overlap, and achieve the effects of improving diffraction efficiency, increasing line dispersion rate, and increasing signal strength

Active Publication Date: 2012-07-04
BEIJING CHINAINVENT INSTR TECH
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Problems solved by technology

[0006] In order to solve the problem of spectral order overlap existing in existing Hadamard transform spectrometers, the present invention provides a high-resolution spectrometer and its optical calibration method

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  • High resolution spectrometer and optical calibrating method thereof
  • High resolution spectrometer and optical calibrating method thereof

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Embodiment Construction

[0025] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 2 The principle of the optical path of the Hadamard transform spectrometer of the present invention is shown. According to the order of incident light, figure 2 The optical path shown includes: an entrance 8 , a collimating mirror 9 , an echelle grating 10 , a prism 11 , a first focusing mirror 12 , a two-dimensional digital micromirror 13 , a second focusing mirror 14 and a detector 15 . The two-dimensional digital micromirror 13 is a digital micromirror in the form of a matrix with multiple rows and columns, and each element in the matrix is ​​a micromirror.

[0027] right figure 2 The working process of the Hadamard transform spectrometer shown is briefly explained. The divergent composite light with the spectral information of the sample to be measured enters the optical path of the Hadamard transform spectrometer fr...

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Abstract

The invention provides a high resolution spectrometer and an optical calibrating method thereof. The high resolution spectrometer is a hadamard transform spectrometer and comprises a light entrance port, a collimating lens, a grating, a first focusing lens, a digital micromirror, a second focusing lens and a detector according to the incident light sequence. A prism is arranged between the first focusing lens and the second focusing lens. The grating is an echelle grating. The digital micromirror is a two-dimensional digital micromirror. The spectrometer can be applied to spectral analysis.

Description

technical field [0001] The invention relates to a spectroscopic analysis device. Background technique [0002] The ultraviolet-visible band is the region with the densest spectral lines in the atomic spectrum. The high-resolution spectrometer in this band can perform qualitative and quantitative analysis of unknown substances. [0003] The Hadamard transform spectrometer is a high-performance modulation spectrometer emerging in recent years. It adopts the Hadamard transform light modulation method, which has the advantages of high signal-to-noise ratio, small size, and fast decoding speed. The Hadamard Transform (HT) is a transformation based on the plane wave function developed in the past forty years. In optical applications, the Hadamard transform is analogous to the weighing design method in statistics. When the accuracy of the scale (detector) is certain, the weight of each object calculated after several objects are weighed in groups is more accurate than the weight...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/433
Inventor 曾立波张新民吴琼水刘佳
Owner BEIJING CHINAINVENT INSTR TECH
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