Near-infrared fluorescence spectrometer based on micro scanning grating micromirror

A technology of fluorescence spectrometer and grating micromirror, which is applied in the field of spectrometer, can solve problems such as low spectral resolution and signal-to-noise ratio, reduced spectral signal stability, complex optical system structure, etc., to simplify the optical system structure and ensure spectral information collection Speed, high-resolution effects

Pending Publication Date: 2021-10-26
CHONGQING UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The optical systems of some existing spectrometers are mostly complex in structure and high in cost, and the aberration caused by the optical system in the process of collecting fluorescence spectral information is large, so that the spectral resolution and signal-to-noise ratio are low. In addition, the existing spectrometers The speed of obtaining spectral information is relatively slow, which reduces the stability of spectral signals, increases the difficulty of system installation and adjustment, is inconvenient to use, and is not worthy of widespread promotion. The spectrometer is used to solve the problems existing in the prior art

Method used

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  • Near-infrared fluorescence spectrometer based on micro scanning grating micromirror
  • Near-infrared fluorescence spectrometer based on micro scanning grating micromirror

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Embodiment 1

[0019] according to figure 1 As shown, the present embodiment provides a near-infrared fluorescence spectrometer based on a micro-scanning grating micromirror, including a detection chamber 1, a fluorescence excitation module, and a near-infrared fluorescence spectroscopy and spectrum acquisition module, wherein the fluorescence excitation module includes sequentially distributed On the optical path, the first light source 2, the first incident slit 3, the collimating reflection system 4, the scanning grating 5, the first focusing lens 6, the first exiting slit 7, the second focusing lens 8, the beam splitter 9 and the first A detector 10, the collimating reflection system 4 is composed of an off-axis parabolic reflector and a plane reflector, the off-axis parabolic reflector and the first light source 2 and the first incident slit 3 are distributed in a three-point line, passing through the first light source 2. The composite light emitted by 2 is incident through the first i...

Embodiment 2

[0030] according to figure 2 As shown, a near-infrared fluorescence spectrometer based on a micro scanning grating micromirror also includes a measurement and control circuit 21 and a host computer 22, the second detector 18 is electrically connected to the measurement and control circuit 21, and the measurement and control circuit 21 is electrically connected to the host computer 22 The detected data is transmitted to the measurement and control circuit 21 through the second detector 18 , and then transmitted to the host computer 22 by the measurement and control circuit 21 .

[0031] When in use, the composite light emitted by the first light source 2 enters through the first incident slit 3, passes through the off-axis parabolic reflector 90° off-axis and collimates into a parallel beam and enters the plane reflector, and the parallel light enters the plane reflector after being reflected by the plane reflector. On the scanning grating 5, the scanning grating 5 scans under...

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Abstract

The invention discloses a near-infrared fluorescence spectrophotometer based on a miniature scanning grating micromirror. The near-infrared fluorescence spectrophotometer comprises a detection chamber, a fluorescence excitation module and a near-infrared fluorescence splitting and spectrum obtaining module, rapid acquisition of near-infrared full-spectrum information is realized by integrating the scanning grating micromirror, a three-dimensional full spectrum of a measured substance can be obtained within one minute by combining with the fluorescence excitation module, and the influence of coma can be effectively reduced by the fluorescence excitation module; a plano-convex cylindrical mirror in the near-infrared fluorescence splitting and spectrum acquisition module is utilized to ensure the imaging quality of near-infrared fluorescence spectrum, aberration caused by an optical system in the fluorescence spectrum information acquisition process is greatly reduced, the spectral resolution and the signal-to-noise ratio are improved, near-infrared spectrum information detection is realized by utilizing a single-tube detector, the spectrum information acquisition speed is ensured, the structure of an optical system is simplified, the cost is reduced, and the system has the advantages of modularization, miniaturization, wide spectrum, high resolution, high signal-to-noise ratio, low cost, high detection speed and the like.

Description

technical field [0001] The invention relates to the technical field of spectrometers, in particular to a near-infrared fluorescence spectrometer based on a miniature scanning grating micromirror. Background technique [0002] A spectrometer is a scientific instrument that decomposes complex light into spectral lines. It is composed of a prism or a diffraction grating. The spectrometer can be used to measure the light reflected from the surface of an object. The seven-color light in sunlight is a part that can be separated by the naked eye. Sunshine is decomposed and arranged according to wavelength. Visible light only occupies a small range of the spectrum, and the rest are spectrums that cannot be distinguished by the naked eye, such as infrared, microwave, ultraviolet, X-ray, etc., through the capture of light information by spectrometers and photographic negatives. Development, or computerized automatic display of numerical instruments for display and analysis, so as to d...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/64G01N21/01
CPCG01N21/359G01N21/6428G01N21/01G01N2021/0112
Inventor 谢瑛珂温泉王晰晨梁恒恒江剑宇
Owner CHONGQING UNIV OF TECH
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