Portable broadband miniature continuous spectrum measuring instrument

A spectrum measurement, wide-band technology, applied in the field of spectrum instruments, can solve the problems of inability to adapt to the environment, narrow spectrum measurement range, large volume, etc., to achieve the effect of convenient compression of the optical path, strong dispersion and collection capabilities, and small size

Inactive Publication Date: 2019-08-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, with the rapid development of society's emphasis on environmental monitoring, food and drug safety and other areas of people's livelihood, the scope of use of spectrometers has also exp

Method used

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  • Portable broadband miniature continuous spectrum measuring instrument
  • Portable broadband miniature continuous spectrum measuring instrument
  • Portable broadband miniature continuous spectrum measuring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: portable wide-band miniature continuum spectrometer, such as figure 1 As shown, including a light-guiding fiber 1, an incident slit 2, a collimating lens 3, a dispersion element, a focusing element, and a photometric detector 6 are sequentially arranged on the output route of the light output by the light-guiding fiber 1;

[0025] The collimator lens 3 shown has a first side and a second side arranged oppositely, the first side is a planar structure, the second side is convex to the outside in an arc surface, and there are several concentric ring-shaped raised textures on the second side, The longitudinal section of the concentric annular raised texture presents a zigzag shape.

[0026] Furthermore, the angle of each annular raised texture is different from that of its adjacent raised texture, and the Fresnel reflection and transmission formulas are as follows:

[0027]

[0028]

[0029]

[0030]

[0031] Based on the Fresnel formula above:...

Embodiment 2

[0036] Embodiment two: if figure 2 As shown, the difference between this embodiment and Embodiment 1 is that further, the light concentrating element is a focusing spherical mirror 51, and by reflecting and focusing the dispersed light onto the photometric detector 6, the entire The optical path structure reduces the volume of the spectrometer, and makes full use of the remaining space of the spectrometer, expanding the imaging range, which is beneficial to the collection of light and color signals by the CCD.

[0037] In order to achieve the effect of optical path compression and volume reduction, on the basis of known existing grating equations, according to the requirements of spectrometer magnification and horizontal magnification, the optical path structure is optimized to improve the light collection ability of optical elements and calculate the incident arm and the length of the exit arm.

[0038] The imaging magnification of light at the entrance slit satisfies the f...

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Abstract

The invention discloses a portable broadband miniature continuous spectrum measuring instrument, and belongs to the technical field of spectrum instruments. The portable broadband miniature continuousspectrum measuring instrument aims at solving the problems that adapting to environment monitoring is not available and the requirements of convenient carrying and installation and the wide spectrummeasurement range need to be met. An incident slit, a collimating lens, a color scattering element, a focusing element and a photometric detector are sequentially arranged on the output path of lightoutput by a light guide fiber, wherein the collimating lens is provided with a first side face and a second side face which are arranged oppositely, the first side face is of a plane structure, the second side face protrudes outwards to form an arc surface, a plurality of concentric annular convex textures are formed in the second side face, and the longitudinal sections of the concentric annularconvex textures are in a zigzag shape. The broadband requirement is met, the size of a spectrograph is reduced, and the portable broadband miniature continuous spectrum measuring instrument has the advantages of being high in carrying performance and high in measurement accuracy.

Description

technical field [0001] The utility model relates to a spectrum measuring instrument, which belongs to the technical field of spectroscopic instruments, and in particular relates to a portable wide-band miniature continuous spectrum measuring instrument. Background technique [0002] A spectrometer is a scientific instrument that decomposes light with complex components into spectral lines. A general spectrometer can analyze the near-ultraviolet light-visible spectrum or near-infrared light-visible spectrum of the tested sample to achieve accurate detection of the tested sample. Qualitative or quantitative analysis of material composition is one of the commonly used spectral analysis instruments in optical laboratories. With the development of the grating monochromator, the spectrometer using the grating monochromator has the advantages of high wavelength accuracy, good monochromaticity, and low stray light, and is widely used in medicine and health, clinical testing, biochem...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/28G01J3/24G01N21/31
CPCG01J3/0208G01J3/24G01J3/2803G01J2003/1295G01J2003/282G01N21/31
Inventor 薛萍王仪晖王宏民
Owner HARBIN UNIV OF SCI & TECH
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