What is the advantage of minitaure spectrometer?

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2020-09-30

Traditional spectrometers use wavelength scanning mechanism for scanning, volume is large and expensive. Compared with this, the micro-optical fiber spectrometer has many advantages, such as fast speed, low price, small volume, light weight and full spectrum acquisition, and can be measured out of the sample room through optical fiber conduction, suitable for online real-time detection.

The charge-coupled device (CCD) makes it possible to miniaturize the spectrometer, which is a new image sensor that reflects the amount of light in terms of the amount of charge and carries on charge transmission in a coupled manner. Multi-linear CCD for micro-type spectrometers has many advantages, such as simple structure and low cost.Multi-linear CCD for micro-type spectrometers has many advantages, such as simple structure and low cost. The charge-coupled device (CCD) makes it possible to miniaturize the spectrometer, which is a new image sensor that reflects the amount of light in terms of the amount of charge and carries on charge transmission in a coupled manner. The pixel size is small and has high geometric precision. It can work in the way of time integration, which has wide adjustment range and strong adaptability. It can sweep the surface automatically, which makes up many shortcomings of the original mechanical structure spectrometer.

However, linear CCD as an image sensor also has its shortcomings, such as the error of the sensor itself. During the operation of the micro-spectrometer, there is loss in the transmission of light through the optical system, and there are errors in the linear CCD itself, which will lead to the distortion of the final spectrum. In order to correctly evaluate the radiation characteristics of the target, these distortions must be eliminated or reduced. Therefore, it is necessary to carry out radiation calibration for spectral instruments.

Secondly, the micro spectrometer is itself a spectral analysis of products, with wavelength and grey value (DN value) as the longitude and display data, and most of the application of the micro spectrometer are not just wavelength and the DN value, but the wavelength and radial flux, in order to make the micro spectrometer is more flexible and more widely used, at the radiation of the hair is will be open.

The radiometric calibration of the miniature spectrometer can eliminate the error of the CCD sensor, and can eliminate and weaken the spectral distortion in the measurement process.