System design of spectral coincidence detection of UV imager for power detection

Ling Luo, Q. Yang, Zun Wang, Di Tao
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Abstract

Ultraviolet imaging technology is a non electric corona testing technology, which uses ultraviolet imager to detect ultraviolet produced by air discharge ionization, and then determine the position and intensity of corona discharge, it has high accuracy and reliability. For the detection and calibration of UV / visible image coincidence of UV imager, the LED integrating sphere light source with UV and visible light is installed to illuminate the star point hole on the focal plane of reflective collimator to simulate the discharge of infinite target. After receiving by the ultraviolet imager, the star point on the focal plane of the collimator will be imaged as a bright spot on the detector surface of the UV imager. The coincidence degree of the ultraviolet and visible light can be obtained by calculating the center position deviation of the imaging spot in two different spectral ranges. This equipment can be used for high-precision calibration of the non-coincidence of the UV imager.
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功率检测紫外成像仪光谱符合检测系统设计
紫外成像技术是一种非电晕检测技术,利用紫外成像仪探测空气放电电离产生的紫外线,进而确定电晕放电的位置和强度,具有较高的准确性和可靠性。为了检测和标定紫外成像仪的紫外/可见光图像重合,在反射准直器焦平面上安装了具有紫外和可见光的LED积分球光源,照射星点孔,模拟无限目标放电。经紫外成像仪接收后,准直器焦平面上的星点在紫外成像仪探测器表面成像为一个亮点。通过计算成像光斑在两个不同光谱范围内的中心位置偏差,可以得到紫外与可见光的重合程度。该设备可用于紫外成像仪非重合的高精度标定。
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