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    • 3. 发明专利
    • Photometer, and nonlinearity correction method therefor
    • 光电测量仪及其非线性校正方法
    • JP2005156242A
    • 2005-06-16
    • JP2003392456
    • 2003-11-21
    • Konica Minolta Sensing Incコニカミノルタセンシング株式会社
    • IMURA KENJI
    • G01J3/02G01J1/04G01J1/08G01J1/16G01J1/42G01J1/44G01J3/18G01J3/28G01N21/27G01N21/31
    • G01N21/274G01J1/08G01J1/1626G01J1/4228G01J2001/0481G01J2003/2866G01N21/31G01N2201/0623G01N2201/127G01N2201/12723
    • PROBLEM TO BE SOLVED: To precisely and efficiently correct nonlinearity without requiring a special facility, in a photometer realized as a spectroluminance meter, a spectroscopic colormeter or the like. SOLUTION: An LED 24 for correction for light irradiation is provided in a light receiving sensor array 22, a computation control circuit 20 finds a correction value in each illuminance level, based on an expected sensor output level expected in the each illuminance level and an actual sensor output level, while lighting on in order at the plurality of illuminance levels with an at least known illuminance ratio, and corrects the sensor output level by the corresponding correction value in the actual measurement to serve as a measured output. The nonlinearity due to exponential-functional characteristics of a photosensor and an amplifier such as discontinuousness of input and output characteristics generated in association with switching of a gain of the amplifier for amplifying a photocurrent, and saturation of a photoelectric transfer characteristic of the photosensor is able to be corrected thereby without using large-scaled configuration such as a bench scale. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:为了精确有效地校正非线性而不需要特殊设备,在作为分光计,光谱仪等实现的光度计中。 解决方案:在光接收传感器阵列22中设​​置用于光照射校正的LED24,计算控制电路20基于每个照度水平预期的预期传感器输出水平,求出每个照度水平的校正值 以及实际的传感器输出电平,同时以至少已知的照度比在多个照度水平上依次点亮,并且将实际测量中的相应校正值校正为传感器输出电平,以作为测量输出。 由于光电传感器和放大器的指数函数特性引起的非线性特性,例如与用于放大光电流的放大器的增益的切换和光电传感器的光电转移特性的饱和相关的输入和输出特性的不连续性, 由此进行校正,而不使用诸如台秤的大规模配置。 版权所有(C)2005,JPO&NCIPI