Spectrophotometer

A spectrophotometer and laser technology, applied in the field of photometer, to achieve ultra-high measurement accuracy and repeatability accuracy, improve noise anti-interference ability, and expand the application field and scope of application

Active Publication Date: 2017-02-15
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems existing in the existing spectrophotometer, the present invention provides a spectrophotometer, which has the characteristics of super large dynamic measurement range and high measurement accuracy and repeatability accuracy

Method used

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Experimental program
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Effect test

Embodiment 1

[0050] figure 2 It is a schematic diagram of the optical path when the spectrophotometer of the present invention measures the transmission element. It can be seen from the figure that the spectrophotometer of the present invention includes a light source module, a reference light module, a photoelectric detection module, a resonant cavity module and a sample module:

[0051] The light source module includes a tunable laser 13 and a pulsed laser 16. In the laser output direction of the tunable laser 13, a laser power adjustment device 14, a monochromator 15, a first beam splitter 17, an aperture 18, and a polarizer are sequentially arranged. 19 and a chopper 20, the laser output direction of the pulsed laser 16 is the first beam splitter 17, the diaphragm 18, the polarizer 19 and the chopper 20;

[0052] The reference light module includes a second beam splitter 21, and the second beam splitter 21 is arranged on the output optical path of the light source module. The second b...

Embodiment 2

[0058] image 3 It is a schematic diagram of the optical path when the spectrophotometer of the present invention measures reflective elements. As can be seen from the figure, the spectrophotometer of the present invention includes a light source module, a reference light module, a photoelectric detection module, a resonant cavity module and a sample module:

[0059] The light source module includes a tunable laser 13 and a pulsed laser 16. In the laser output direction of the tunable laser 13, a laser power adjustment device 14, a monochromator 15, a first beam splitter 17, an aperture 18, and a polarizer are sequentially arranged. 19 and a chopper 20, the laser output direction of the pulsed laser 16 is the first beam splitter 17, the diaphragm 18, the polarizer 19 and the chopper 20;

[0060] The reference light module includes a second beam splitter 21, and the second beam splitter 21 is arranged on the output optical path of the light source module. The second beam split...

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Abstract

A spectrophotometer comprises a light source module, a reference light module, a resonant cavity module, a sample module and a photoelectric detection module. The spectrophotometer has the advantages of large dynamic measuring range, high detection precision and high repeatability precision, and wide application prospect is achieved.

Description

technical field [0001] The invention relates to a photometer, in particular to a spectrophotometer, which has a super large dynamic measurement range and super high measurement precision. Background technique [0002] The core technology of the spectrophotometer is to measure the transmittance and reflectance of light at a specific wavelength or within a certain wavelength range. Inspection, metallurgy and other modern industrial production and management departments have obtained extensive and important applications. At present, spectrophotometers generally adopt the measurement framework of dual-light path photometry, such as figure 1 As shown, it mainly includes polychromatic light source 1, monochromator 2, aperture 3, polarizer 4, beam splitter 5, attenuation plate 6, focusing lens 7, reference light detector 8, sample holder 9, sample 10, focusing Lens 11, test light detector 12. The polychromatic light emitted by the polychromatic light source 1 passes through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/39G01N21/55G01N21/01G01J3/02
CPCG01J3/02G01J3/0245G01J3/0297G01N21/01G01N21/31G01N21/39G01N21/55G01N2021/0112G01N2021/3196G01N2021/558G01N2201/06113
Inventor 刘世杰王圣浩王微微倪开灶徐天柱
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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