全日盲紫外成像探测仪光学系统设计

Design of optical system used for solar-blind UV imaging detector

全日盲紫外成像探测仪可对架空输电线路产生的电晕进行早期探测,降低电力设备损伤。紫外物镜作为全日盲紫外成像探测仪的核心元器件,其性能指标直接影响探测仪的性能。针对电晕检测系统大多存在光能利用率不足的问题,设计了一种基于分色分光的同轴光学系统,消除了中心视场遮拦,增大了紫外光通道的通光口径,有效提高了电晕探测系统的能量收集能力。设计的紫外物镜全视场全探测范围内点列图均方根小于0.14 mm,满足紫外电晕探测的分辨率需求。相较于国外紫外成像探测仪的光学系统,分色分光同轴光学系统的全日盲紫外成像探测仪对能量的收集能力明显高于国外紫外成像探测仪。

The solar-blind ultraviolet （UV） imaging detector can detect the corona generated by the overhead transmissionline early, and reduce the damage of electrical equipments. The UV objective is taken as the core component of the solar-blindUV detector, whose performance indicator affects on the performance of the detector directly. Since the corona detection systemhas the problem of insufficient solar energy utilization efficiency, a coaxial optical system based on wavelength and light separa-tion was designed to eliminate the shelter of the center field, and enlarge the optical aperture of the UV channel, improve theenergy collection ability of the corona detection system effectively. The root mean square of the spot diagram of the designed UVobjective within the full field and whole detection range is less than 0.14 mm, and meets the requirement of UV corona detec-tion resolution. In comparison with the optical system of the foreign UV imaging detector, the energy collection ability of the solar-blind UV imaging detector adopting the wavelength and light separation coaxial optical system is superior.