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Three important components of a spectrometer

Release time: 2019-12-30 10:52:43 Click: 369

Slit )、色散元件( Dispersive element )、检测器( Detector )。 Generally speaking, a spectrometer has three important components: a slit ( Slit ), a dispersive element ( Dispersive element ), and a detector ( Detector ). 的评价指标之一便是色散能力( Dispersive power )。 In the performance evaluation of the spectrometer, one of the important evaluation indexes is the dispersive power .

In simple terms, it is how wide the dispersive element can disperse the polychromatic light. The wider the light is dispersed, the better the resolution of the spectrometer.

It can be seen that the farther the focal plane is, the denser the engraved lines, the stronger the dispersion ability. The latter is limited by the grating manufacturing process. Traditional spectrometers often work hard, which is why the spectrometer is relatively large.

detector 上所能展现的光谱范围变小了,所以,当光栅光谱仪发展到一定阶段后,人们发现重要的问题又出现在了检测器( detector )这一侧。 However, it is worth noting that the higher the resolving power of the spectrometer, the better the difference between light with similar wavelength can be distinguished, but the price is that the spectral range displayed by a certain length detector becomes smaller, so When the grating spectrometer developed to a certain stage, it was found that important problems appeared on the detector side.

Detector

The photosensitive element is the core of the direct-reading spectrometer. The quality of the components is related to the accuracy of the precision instrument. OES )的核心元件有三种 , 一种是广泛使用的 CCD (电荷耦合)元件;另一种是 CMOS (互补金属氧化物半导体)器件 , 还有一种是 PMT 光电倍增管。 There are three kinds of core components of direct reading spectrometer ( OES ) , one is the widely used CCD (charge coupled) element; the other is a CMOS (Complementary Metal Oxide Semiconductor) device , and the other is a PMT photomultiplier tube.

The above devices are the core devices of the spectrometer. The quality of the components is very important to the type of spectrometer.

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