Double-beam spectrometer

A spectrometer and double-beam technology, applied in the field of spectral measurement, can solve the problems of reducing the intensity of reference light, limited measurement speed, complex instrument structure, etc., and achieve the effects of avoiding measurement errors, low cost, and small size

Inactive Publication Date: 2013-04-17
ZHEJIANG UNIV
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Problems solved by technology

The dual-beam spectrometer uses a mechanical rotation mechanism to scan the monochromatic wavelength, which greatly limits the measurement speed. In addition, the double-beam mechanism divides the same beam of light into two beams, which reduces the light intensity of the reference light and reduces the signal-to-noise ratio. The instrument structure is complex and expensive

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Embodiment Construction

[0027] The dual-beam spectrometer of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, a double-beam spectrometer includes a light source 1, a first optical fiber 7, a second optical fiber 6, a third optical fiber 14, and a spectrometer host 17. The spectrometer host 17 includes a slit sheet 18, a collimating mirror 19, and Planar grating 20 , imaging mirror 21 , cylindrical mirror 22 and area array detector 23 .

[0029] The light source 1 includes a light bulb 2 and a beam shaping lens 3; the beam shaping lens 3 is used to focus the probe light and reference light emitted by the light bulb 2 onto the end face of the optical fiber, effectively improving the efficiency of the light source and the coupling efficiency of the fiber.

[0030] The first optical fiber 7, the second optical fiber 6 and the third optical fiber 14 form a dual-core optical fiber 4 and a dual-core optical fiber 15. Th...

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Abstract

The invention discloses a double-beam spectrometer, which comprises a light source for emitting reference light and detection light and a spectrometer main unit. The double-beam spectrometer is also provided with a first optical fiber, a second optical fiber and a third optical fiber, wherein the first optical fiber is used for transmitting the reference light from the light source to the spectrometer main unit; the second optical fiber is used for transmitting the detection light from the light source to a sample; and the third optical fiber is used for transmitting the detection light with sample information from the sample to the spectrometer main unit. The spectrometer main unit comprises a slit piece, a collimating lens, a plane grating, an imaging lens, a cylindrical lens and an area array detector, which are sequentially arranged along a light path. The emergent light of the first and second optical fibers enters the slit piece. The reference light and the detection light are simultaneously displayed and received, and the influence of light source fluctuation, stray light and electrical noise is effectively eliminated.

Description

technical field [0001] The invention belongs to the field of spectrum measurement and relates to a double-beam spectrometer capable of simultaneously displaying and analyzing reference light and detection light. Background technique [0002] A spectrometer is a basic optical detection instrument for spectral research and analysis. It can realize the analysis of light components, the analysis of material properties, and the identification of material components through the measurement of transmission, reflection, and absorption spectra. At present, spectrometers are widely used in optical detection, biochemical analysis, metallurgical industry, environmental detection, atmospheric remote sensing, astronomical research and other fields, and the requirements for the accuracy of spectral measurement are getting higher and higher. [0003] According to the optical path structure of the instrument, the spectrometer can usually be divided into two types: single-beam spectrometer an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/42G01N21/25
Inventor 刘康庄振锋余飞鸿
Owner ZHEJIANG UNIV
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