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A full-spectrum 800nm-2500nm dual-detector miniature near-infrared spectrometer

A near-infrared spectrometer and dual-detector technology, which is applied in the field of spectral measurement, can solve the problems of lack of continuous spectrum, unable to preprocess the spectrum, poor wavelength resolution, etc., to achieve stable optical path structure, improve control stability and accuracy , the effect of reducing the size of the instrument

Active Publication Date: 2018-12-11
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this type of instrument are: monochromatic light has a wide spectral band and poor wavelength resolution; it is more sensitive to temperature and humidity; it cannot obtain continuous spectrum; it cannot preprocess the spectrogram, and the amount of information obtained is small
The disadvantage is that it is more sensitive to the polarization state, and the resolution is lower, etc.

Method used

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  • A full-spectrum 800nm-2500nm dual-detector miniature near-infrared spectrometer
  • A full-spectrum 800nm-2500nm dual-detector miniature near-infrared spectrometer
  • A full-spectrum 800nm-2500nm dual-detector miniature near-infrared spectrometer

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings.

[0026] See figure 1 In an embodiment of the present invention, the optical path system of the miniature near-infrared spectrometer is composed of a near-infrared light source 1, an incident slit 2, a concave collimator mirror 3, a MOEMS scanning grating micromirror 4, a concave imaging mirror 5, and an exit slit 6. , 500nm-1700nm single tube near infrared detector 7 and 900nm-2600nm single tube near infrared detector 8.

[0027] In this embodiment, an improved Czerny-Turner structure of the optical path system is adopted, and the MOEMS scanning grating micromirror 4 is used as the optical axis. Two groups of 100mm concave collimator 3, the distance between the center of mass and the vertical axis of the optical axis is 16.5mm and 19.5mm respectively, and the off-axis angle is -10 o And 5 o , The rotation angle of MOEMS scanning grating micromirror 4 is ±6.5 o , And install a single-tube...

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Abstract

The invention provides a double-detector micro near-infrared spectrometer with a whole spectral band of 800-2,500nm. The double-detector micro near-infrared spectrometer consists of a near-infrared light source, an entrance slit, a concave collimating lens, an MOEMS scanning raster micro-mirror, a concave imaging lens, an exit slit and mono-tube near-infrared double sensors different in response wavelength range. In the invention, the improved Czerny-Turner optical path system effectively inhibits aberration and guarantees the imaging quality of the system. By adopting the MOEMS scanning raster micro-mirror integrated with an angle sensor, the double-detector micro near-infrared spectrometer provided by the invention has scanning and light splitting functions in a broadband range and also can accurately control the scanning angle in real time to realize continuous and accurate detection of different wavelengths of the mono-tube near-infrared double sensors. The double-detector micro near-infrared spectrometer has the advantages of low price, small volume, fast response, high precision, wide detection spectral range and the like.

Description

Technical field [0001] The invention relates to a miniature near infrared spectrometer, belonging to the technical field of spectrum measurement. Background technique [0002] Spectral analysis instruments are an important part of modern optical instruments. By applying the principle of spectroscopy, qualitative and quantitative analysis of the structure and composition of substances can be achieved. Near-infrared spectroscopy refers to electromagnetic waves with wavelengths ranging from 800nm ​​to 2500nm. In the near-infrared spectrum, the main research is the combined frequency and double frequency absorption of hydrogen-containing group vibration. Different molecular structures have different vibration frequencies, so the corresponding infrared absorption spectra are also different. The near-infrared spectrometer realizes the component identification function by identifying the absorption spectra of different molecular structures. The existing near-infrared spectrometers ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 温志渝周颖温泉黄俭
Owner CHONGQING UNIV
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