1. Center for Optics and Optoelectronics Research, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China
2. Hangzhou Brolight Technology Co. Ltd, Hangzhou, Zhejiang 311400, China
Abstract Optoelectronic array sensors exhibit nonlinearity near saturation, but can be corrected by extrapolating the coefficients in the linear region of the array sensors. The response curve between exposure and A/D conversion can be extended to any wavelength position as long as the exposure curveis measured at one wavelength position. For this reason, the least square method is used through polynomial fitting and software nonlinearity correction. Under the same hardware configuration, the linear region of linear array sensor is added, and the dynamic range of sensor is extended. In the whole dynamic range, the measurement error of the system can be reduced to ±2%. This non-linear correction method is also very suitable for intensity calibration correction in spectrometer production factories using photoelectric array sensors.
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2019, Vol. 40 
