单色仪波长定标中狭缝设置的影响分析
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摘要
单色仪作为一种分光仪器,在传感器的辐射定标等方面具有重要应用。在实际应用过程中,其波长和带宽的设置对传感器的精确定标具有重要影响。使用低压汞灯作为波长标准光源,通过对其特征谱线扫描的方法,研究了传感器定标过程中,设置单色仪不同的狭缝宽度,对传感器精确定标具有重要影响。结果显示,当出射入射狭缝相同,同时改变其宽度的情况下,与典型校准状态(出射入射狭缝宽度设置为0.5mm)相比,波长偏差量达到0.17nm;当入射狭缝与出射狭缝不一致时,与典型校准状态相比,波长偏差量达到0.18nm;当光源未充满入射狭缝与充满入射狭缝相比,最大误差达到0.02nm,该影响几乎可以忽略。在相关的传感器光谱辐射定标实验研究中,单色仪的定标精度和准确性评估等方面具有重要应用。
As a kind of spectroscopic instrument,the monochromator has important applications in radiation calibration of sensors.In the actual application process,the setting of wavelength and bandwidth has an important influence on the precise calibration of the sensor.The lowpressure mercury lamp is used as the wavelength standard light source.Through the method of characteristic line scanning,it is studied that in the process of sensor calibration,it has an important influence on the precise calibration of the sensor under different slit widths of the monochromator.The results show that when the exit pupil is the same and the width is changed at the same time,the maximum deviation of the wavelength is 0.17 nm compared with the typical calibration state(the exit slit width is set to 0.5 mm);when the incident slit is inconsistent with the exit slit,the maximum wavelength deviation is 0.18 nm compared to the typical calibration state;when the light source is not filled with the entrance slit and the full aperture is filled,the maximum error is 0.02 nm,and the effect is almost negligible.In the related experimental study of sensor spectral radiometric calibration,the calibration accuracy and accuracy evaluation of monochromator have important applications.
As a kind of spectroscopic instrument,the monochromator has important applications in radiation calibration of sensors.In the actual application process,the setting of wavelength and bandwidth has an important influence on the precise calibration of the sensor.The lowpressure mercury lamp is used as the wavelength standard light source.Through the method of characteristic line scanning,it is studied that in the process of sensor calibration,it has an important influence on the precise calibration of the sensor under different slit widths of the monochromator.The results show that when the exit pupil is the same and the width is changed at the same time,the maximum deviation of the wavelength is 0.17 nm compared with the typical calibration state(the exit slit width is set to 0.5 mm);when the incident slit is inconsistent with the exit slit,the maximum wavelength deviation is 0.18 nm compared to the typical calibration state;when the light source is not filled with the entrance slit and the full aperture is filled,the maximum error is 0.02 nm,and the effect is almost negligible.In the related experimental study of sensor spectral radiometric calibration,the calibration accuracy and accuracy evaluation of monochromator have important applications.
引文
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[2]ZHANG Lei,DAI Jingmin.Calibration method for the monochromator based on continuous spectrum light source[J].Spectroscopy and Spectral Analysis,2015,35(8):2348-2351.张磊,戴景民.基于连续光谱光源的单色仪标定方法[J].光谱学与光谱分析,2015,35(8):2348-2351.
[3]OUYANG H,DAI C,HUANG B,et al.Bandwidth determination of a Czerny-Turner double monochromator with varied slit widths through experiment and data computation[J].International Conference on Optical Instruments and Technology:Optical Systems and Modern Optoelectronic Instruments.International Society for Optics and Photonics,2011,8197(1):43.
[4]WANG Pengcheng,YUAN Zundong,YU Fan,et al.Experiment and research of calibrating the wavelength of the grating monochrometer[J].Acta Metrologica Sinica,2007,28(3A):169-173.王鹏程,原遵东,于帆,等.光栅单色仪的波长标定实验研究[J].计量学报,2007,28(3A):169-173.
[6]QIAO Daoe,GU Yuhai,XU Xiaoli.Wavelength calibration algorithm in grating spectrometer[J].Acta Photonica Sinica,2009,38(9):2283-2287.乔道鄂,谷玉海,徐小力.光栅光谱仪波长校准算法研究[J].光子学报,2009,38(9):2283-2287.
[7]PEI Nannan,LIU Guorong.Wavelength calibration method based on the laser induced breakdown spectroscopy[J].Journal of Applied Optics,2007,28(1):68-71.裴楠楠,刘国荣.基于激光诱导击穿光谱的波长校准法研究[J].应用光学,2007,28(1):68-71.
[8]MCHIN G,BLOEMBERGEN P,ANHALT K,et al.Practical Implementation of the mise en pratique for the definition of the Kelvin above the silver point[J].International Journal of Thermophysics,2010,(31):1779-1788.
[9]FRASSETTO F,BONORA S,VOZZI C,et al.Active-grating monochromator for the spectral selection of ultrashort pulses[J].Optics Express,2013,21(11):12996-13004.
[10]ZHENG Xiaobing,WU Haoyu,ZHANG Junping,et al.High-accuracy primary and transfer standards for radiometric calibration[J].Science Bulletin,2000,45(21):2009-2013.
[11]ZHANG Zihui,WANG Shurong,HUANG Yu,et al.High-precision wavelength calibration of wideband monochromator[J].Spectroscopy and Spectral Analysis,2012,32(10):2870-2874.张子辉,王淑荣,黄煜,等.宽波段单色仪多级谱高精度波长定标[J].光谱学与光谱分析,2012,32(10):2870-2874.
[12]OUYANG H,DAI C,HUANG B,et al.Effect of slit widths on wavelength calibration of a CzernyTurner double monochromator[J].International Conference on Optical Instrument and Technology,2011,8201(12):64.