Function of fiber optic spectrometer is introduced

by:FOT     2020-07-05
fiber optic equipment spectrometer is a kind of measuring tool, mainly used for measuring the ultraviolet, visible and near infrared and infrared light intensity of the instrument, measurement, high degree of, flexible use, good reliability, etc. User functions are specific for fiber optic spectrometer understand? Grating grating choice depends on the spectral range and resolution requirements. For the fiber optic spectrometer, usually in the 200 - nm - spectral range 2200 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. A narrow slit slit can improve resolution, but luminous flux is smaller; Broad slit, on the other hand, can increase the sensitivity, but lose resolution. In the different application requirements, choose the right slit width in order to optimize the whole test results. Detector probe is in some ways determines the sensitivity and resolution of the spectrometer, detector light sensitive area is limited in principle, it is divided into many small pixels for high resolution or divided into fewer but larger pixel for high sensitivity. Back light sensitive CCD detector sensitivity is usually better, to a certain extent, so it can get better resolution in the case of no sensitivity. Near infrared InGaAs detector due to high sensitivity and thermal noise itself, adopt the way of refrigeration can effectively improve the SNR of the system. Rely on complex enjoy spectrometer from the world advanced optical detector manufacturers, such as Sony, Hamamatsu, Thoshiba, etc. Filter because of the influence of the multistage diffraction spectrum itself, the filter can reduce the interference of multistage diffraction. Unlike conventional spectrometer, spectrometer is coated on detector, this part of the function in the factory need to install in place. At the same time, the coating also has the function of antireflective improve the SNR of the system. The performance of the spectrometer is mainly determined by spectral range, optical resolution and sensitivity. For more than one parameter changes usually will affect the performance of other parameters. Spectrometer's main challenge is not to make all the parameters in manufacturing high zui, but to make the technical index of the spectrometer in the three-dimensional space choice to meet performance requirements for different applications. This strategy can satisfy the customer to make spectrometer zui small investment, zui large returns. The cube depends on the size of the spectrometer, specifications of the needed to achieve the size and the price of the product is related to the complexity of the spectrometer and spectrometer. Spectrometer products should be completely conform to the technical parameters required by the customer. After enjoy products can be found in many types of spectrometer is suitable for various applications in the field of equipment and no longer need to design models of high prices. Spectral range spectral range smaller spectrometer can often give detailed spectral information, on the contrary a wide range of spectral range has a wider visual range. Therefore spectrometer spectral range is must explicitly specify one of the important parameters. Factors affecting spectral range is primarily a grating and detector, according to different requirements to select appropriate grating and detector. The resolution of the optical resolution is one of the important parameters to measure the spectral ability. It depends on in the thermal sensor to detect when the bandwidth of the monochromatic light. Three components have an impact on resolution: incident slit, grating and detector pixel size. Tiny slit can get better resolution, but reduces the sensitivity; High score line grating increases the resolution, but reduces the spectrum; Smaller detector pixel size increases the resolution, but reduces the sensitivity. By visible on, choose between three important indexes of spectrometer has a very close. Usually we need to understand what we need zui, according to the principle of the slit, selection of grating and detector.
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