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Spectrophotometer for quickly measuring spectrum

A spectrophotometer, a technology for measuring spectra, applied in the direction of spectrometry/spectrophotometry/monochromator, measuring device, optical radiation measurement, etc., can solve the problem of slow measurement speed of spectrophotometer, taking a few minutes, Problems such as real-time measurement cannot be used to achieve the effects of solving measurement errors, improving measurement speed, and improving accuracy

Inactive Publication Date: 2006-03-29
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Since the detector 18 can only obtain data of a single wavelength every time the data is collected, the measurement speed of the existing spectrophotometer is very slow, and it usually takes several minutes to measure a sample. If the measurement accuracy is relatively high, And the scanning wavelength range is relatively large, and it takes more time, some even as long as ten minutes
At the same time, the spectrophotometer cannot be used for real-time measurement due to its slow measurement speed.

Method used

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  • Spectrophotometer for quickly measuring spectrum
  • Spectrophotometer for quickly measuring spectrum
  • Spectrophotometer for quickly measuring spectrum

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with drawings and embodiments.

[0036] see first figure 1 , figure 1 It is the schematic diagram and the main light path diagram of the spectrophotometer embodiment of fast measurement of the present invention; As can be seen from the figure, the spectrophotometer of fast measurement spectrum of the present invention includes a light source, and on the main light path output by the light source, there are successively: A spectrophotometric system composed of the second half mirror 5, the sample stage 6, the first mirror 7, the second mirror 8 and the third half mirror 9, a color wheel 10, a third mirror 11, and a concave surface Mirror 12, diffraction grating 13, slit 3 and receiving system, the output terminal of this receiving system is connected with a data processing and controller, and this data processing and controller have software to control the second half mirror 5 and the third half mirr...

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Abstract

The present invention relates to a spectrophotometer for quickly measuring optical spectrum. It includes a light source, on the main optical path of light source output successively are set spectrophotometric system, colour wheel, third reflecting mirror, concave reflecting mirror, diffraction grating, slit and receiver, the output end of said receiver is connected with a data processor and a controller. It is characterized by that the described light source is formed from a broad spectrum halogen tungsten lamp, a deuterium lamp and switchover type first half-transmitting half-reflecting mirror on the optical path of light source output. The described slit is positioned between the described light source and second half-transmitting half reflecting mirror, and between the slit and second half-transmitting half-reflecting mirror also is set a collimating composite lens, and between the described concave reflecting mirror and the described receiving system also is set a convergent lens, and the described receiver is an array of CCD.

Description

technical field [0001] The invention relates to a spectrum measuring instrument, in particular to a spectrophotometer for fast spectrum measurement. Background technique [0002] As a spectral measuring instrument, a spectrophotometer can measure the spectral curves of a sample such as reflection, transmission, and absorption. It is a very important testing instrument in physics, chemistry, and life sciences. [0003] The existing spectrophotometer structure diagram is as follows Figure 6 As shown, it mainly performs dispersion separation through the diffraction grating 12, and then uses the slit 3 to select light of a single wavelength as the measurement light. By rotating the angle of the grating 12, light with different wavelengths passes through the slit 3, so that continuous monochromatic light can be obtained. Since the detector 18 can only obtain data of a single wavelength every time the data is collected, the measurement speed of the existing spectrophotometer is ...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01J3/00
Inventor 傅小勇易葵朱美萍王丹申雁鸣毕军邵建达范正修
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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