The choice of optical fiber grating spectrometer

by:FOT     2020-06-24
fiber optic equipment spectrometer is a branch of the spectrometer, with small volume, fast acquisition spectral features. Compared with large spectrometer through grating for different wavelength spectrum information, fiber optic spectrometer using the array CCD spectrum of different wavelengths information collected at the same time, the structure is more stable. Appearance of small, and because fiber optic spectrometer has been widely applied in industrial field. Fiber optic spectrometer generally include incident slit, collimating lens and dispersion components ( Grating or prism) , focusing optical system and detector. In the monochromator often including exit slit, make a very narrow part of the whole spectrum irradiation on single pixel detector. In the incident and exit slit of the monochrometer often fixed position and width adjustable, can be achieved by rotating grating to scan the entire spectrum. The choice of the grating depends on the spectral range and resolution requirements. For the fiber optic spectrometer, usually in the 200 - nm - spectral range 2500 nm. Due to demand higher resolution can be hard to get broad spectrum scope; At the same time, the higher the resolution requirements, its luminous flux will be less. For low resolution and wider spectral range, 300 lines/mm grating is usually the choice. If the requirement is high spectral resolution, you can select 3600 lines/mm grating, or choose more pixels resolution of the detector. Fiber optic spectrometer data acquisition capability can be through the use of array detector and the way of using movement components is greatly increased. However, for each specific application has its zui optimization detector. As for the application of quick response, we recommend USB2000 + spectrometer, zui small integration time is 1 millisecond, ever zui fast fiber optic spectrometer. And for those who is very strict with data transmission time of the application, we recommend to choose USB2000 + spectrometer, through USB2. 0 interface can complete 1000 complete data collection every second.
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