侯西旗, 秦艳, 李燕, 伍贤祥. 用双孔法校准高精度分光光度计的光度标尺[J]. 应用光学, 2006, 27(supp): 76-78.
引用本文: 侯西旗, 秦艳, 李燕, 伍贤祥. 用双孔法校准高精度分光光度计的光度标尺[J]. 应用光学, 2006, 27(supp): 76-78.
HOU Xi-qi, QIN Yan, LI Yan, WU Xian-xiang. hotometric scale of high accuracy spectrophotometercalibrated with doubleaperture method[J]. Journal of Applied Optics, 2006, 27(supp): 76-78.
Citation: HOU Xi-qi, QIN Yan, LI Yan, WU Xian-xiang. hotometric scale of high accuracy spectrophotometercalibrated with doubleaperture method[J]. Journal of Applied Optics, 2006, 27(supp): 76-78.

用双孔法校准高精度分光光度计的光度标尺

hotometric scale of high accuracy spectrophotometercalibrated with doubleaperture method

  • 摘要: 针对系统的非线性误差是影响分光光度计光度精度的主要因素,而常用的校准方法如化学标准法和中性滤光片法因其自身的不确定度被限制在0.005,已无法对高精度分光光度计(光度不确定度优于0.001)的光度标尺进行校准。提出的双孔法可解决高精度分光光度计光度标尺的校准问题。介绍了双孔法校准分光光度计光度标尺的测量原理及用双孔附件校准Lambda 950分光光度计的方法步骤。根据测量原理和方法步骤得到了Lambda 950分光光度计的非线性参数,通过计算得到了250nm~2500nm波长范围仪器的非线性误差,利用所得结果对仪器光度标尺进行了校准,校准后的光度精度优于0.0005。

     

    Abstract: Since the systematic nonlinear error is the primary factor that influences the photometric precision of spectrophotometer and the common methods such as chemistry standard method and neutral density filter method for calibrating the photometric scale of a spectrophotometer can not meet the needs for calibrating the photometric scale of high precision spectrophotometers which require the uncertainty of photometric scale to be less than 0.001 (but the common methods is confined to 0.005), the doubleaperture method is brought forward in this paper. The measurement principle of the doubleaperture method for calibrating photometric scale of spectrophotometers and the way for calibrating Lambda 950 Spectrophotometer are introduced in details. The nonlinear parameters of Lambda 950 Spectrophotometer were obtained with the method. The nonlinear error was derived for the instruments working in 250nm~2500nm. The accuracy of photometric scale, preceding 0.0005, was acquired after calibration with the parameters.

     

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