为评估日盲紫外像增强器的带内响应能力及带外截止能力, 基于标准替代法, 设计并实现了宽光谱大动态范围的日盲紫外像增强器绝对光谱响应测试系统。系统选择宽波段、高亮度、高稳定性的激光泵浦白光光源作为基本光源, 与单色仪配合构建了单色辐照场, 并采用可溯源于美国 NIST标准的硅陷阱探测器作为参考探测器, 通过高精度静电计和多种抗干扰手段进行微弱电流测量, 实现了对日盲紫外像增强器绝对光谱响应的高精度测试。实验结果表明: 系统可覆盖光谱范围 200 nm~630 nm, 动态范围达 106, 测试不确定度低于 5.5%。该测试系统稳定可靠, 精度高, 基本满足日盲紫外像增强器筛选的应用需求。

To assess the solar blind image intensifier, a wide spectrum and large dynamic test system for absolute spectral response of solar blind UV image intensifier was designed and realized based on the standard alternative method. The test system took an ultra-high brightness, high stability broadband laser-driven EQ99 as the basic light source, the spectral-meter as the monochromator and the NIST calibrated silicon trap detector as the reference detector. It also achieved the low current measurement by using a high-accuracy electrometer and a variety of remedies. Experimental results indicate that the system covers spectrum of 200 nm ~ 630 nm and a dynamic range up to 106, and the uncertainty is less than 5.5%. The auto-test system is stable, high-precision and meets the solar blind image intensifier assessment requirement.