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Adama conversion near infrared spectrometer

A technology of near-infrared spectrometer and Hadamard transformation, which is applied in the measurement of phase influence characteristics, etc. It can solve the problems of low signal-to-noise ratio and large error of spectrometer detection results, and achieve the effects of improving sensitivity, increasing luminous flux, and reducing power consumption

Inactive Publication Date: 2009-04-29
BEIJING CHINAINVENT INSTR TECH
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Problems solved by technology

[0008] In order to solve the problems of large error and low signal-to-noise ratio in the detection results of spectrometers in the prior art, the present invention provides a novel Hadamard transform near-infrared spectrometer

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Embodiment Construction

[0024] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Such as figure 2 As shown, the shape of the micromirror surface 6 forming the micromirror array is rectangular, and many single micromirrors 6 are arranged side by side along the short axis direction to form a one-dimensional micromirror array, and the light of different wavelength intervals is irradiated on the surface of the micromirror respectively, as The light of different wavelengths is irradiated on the surface of different micromirrors after the grating splits light from left to right. The width of each micromirror is within the same order range as the width of the existing two-dimensional micromirrors of 16 microns. Preferably, the size of the micromirrors is 10-100 microns in width and 0.5-10 mm in length. The micromirror 6 can also be not a rectangle but other elongated shapes with a major axis and a minor axis, such as a...

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Abstract

The invention provides a novel hadamard transform near-infrared spectrometer, which aims to improve the luminous flux of single micromirrors of a micromirror array of the hadamard transform near-infrared spectrometer further to improve detection sensitivity and signal-to-noise ratio. The hadamard transform near-infrared spectrometer comprises an one-dimensional micromirror array arranged by the micromirrors; the shapes of mirror faces of the micromirrors are strips with long axes and short axes; the one-dimensional micromirror array is formed by the micromirrors which are parallelly and linearly arranged along the short axis direction of the mirror faces of the micromirrors; and the arrangement direction is along a spectral dispersion direction. Lights in different wavelength intervals which are subjected to chromatic dispersion through a preposition optical system and a grating are irradiated to the surfaces of the micromirrors respectively which are parallelly arranged, and are focused on a detector by a postposition optical system through the reflection of the micromirrors. The areas of the single micromirrors are increased, and the luminous flux is increased, so the adoption of the technical proposal can ensure that the detection sensitivity of an instrument is improved, and the signal-to-noise ratio of a detection result is improved by more than 10 times.

Description

technical field [0001] The invention belongs to spectrum analysis equipment, in particular to near-infrared spectrum analysis equipment. Background technique [0002] Near-infrared (NIR) analysis technology is a high-tech analysis technology that has developed rapidly in the field of analytical chemistry in recent years. Its appearance can be said to have brought another revolution in analysis technology. The application of near-infrared spectroscopy was discovered two centuries ago. However, due to the weak multiplication and combined frequency absorption signals of substances in this spectral region, overlapping bands, and complex analysis, limited by the technical level at that time, near-infrared spectroscopy was "sleeping". "For nearly a century and a half. Until the 1950s, with the emergence of high-performance commercial instruments and a lot of work done by Norris et al., near-infrared spectroscopy was once applied in the analysis of agricultural and sideline produc...

Claims

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Application Information

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IPC IPC(8): G01N21/45
Inventor 张新民
Owner BEIJING CHINAINVENT INSTR TECH
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