10 February 2017 Measurement device for high-precision spectral transmittance of solar blind filter
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Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102501B (2017) https://doi.org/10.1117/12.2266650
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China
Abstract
In order to measure spectral transmittance of solar-blind filter ranging from ultraviolet to visible light accurately, a high-precision filter transmittance measuring system based on the ultraviolet photomultiplier is developed. The calibration method is mainly used to measure transmittance in this system, which mainly consists of an ultraviolet photomultiplier as core of the system and a lock-in amplifier combined with an optical modulator as the aided measurement for the system. The ultraviolet photomultiplier can amplify the current signal through the filter and have the characteristics of low dark current and high luminance gain. The optical modulator and the lock-in amplifier can obtain the signal from the photomultiplier and inhibit dark noise and spurious signal effectively. Through these two parts, the low light passing through the filters can be detected and we can calculate the transmittance by the optical power detected. Based on the proposed system, the limit detection of the transmittance can reach 10-12, while the result of the conventional approach is merely 10-6. Therefore, the system can make an effective assessment of solar blind ultraviolet filters.
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Yan Wang, Yan Wang, Yunsheng Qian, Yunsheng Qian, Yang Lv, Yang Lv, Cheng Feng, Cheng Feng, Jian Liu, Jian Liu, } "Measurement device for high-precision spectral transmittance of solar blind filter", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102501B (10 February 2017); doi: 10.1117/12.2266650; https://doi.org/10.1117/12.2266650
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