基于日盲紫外光辐射特性的非共光轴紫外成像仪集成研制

Integrated Development of Non-coaxial UV Imager Based on Solar-blind UV Radiation Characteristics

基于日盲紫外波段放电发射光谱特性和紫外光(ultraviolet,UV)辐射传输特性,集成研制可见光与紫外非共光轴结构的日盲紫外成像仪。首先,利用放电发射光谱测量试验平台,获得针-板模型和瓷绝缘子沿面放电的日盲紫外波段发射光谱。紫外成像仪采用非共光轴双光路结构设计,根据测得的放电发射光谱选定了日盲紫外滤光片,并基于紫外光辐射传输特性确定了通光口径、系统焦距和80%弥散斑半径等紫外光学系统技术指标。然后,利用仿射变换模型和加权平均法进行了可见光与紫外图像融合系统设计,集成后仪器样机的最小紫外灵敏度为2×10^(-10)μW/cm^(2)。最后,利用紫外检测结果一致性校准方法,建立了紫外检测辐射传输模型,对集成研制的紫外成像仪进行了一致性校准。

Based on the discharge emission spectral characteristics and ultraviolet(UV)radiation transmission properties in the solar-blind UV wavelength range,a non-coaxial visible and UV imaging system for solar-blind UV imager was integrated.Firstly,the emission spectra of needle-plane model and surface discharges on porcelain insulators in the solar-blind UV wavelength range were obtained using an emission spectral measurement test platform.The UV imaging system was designed with a non-coaxial dual-optical-path structure.Based on the measured emission spectra,a solar-blind UV bandpass filter was selected,and the technical parameters of the UV optical system,including the effective aperture,system focal length,and 80%encircled energy radius,were determined based on the UV radiation transmission properties.Furthermore,a visible and UV image fusion system was designed using an affine transformation model and weighted averaging method.The integrated prototype of the system achieved a minimum UV sensitivity of 2×10^(-10)μW/cm^(2).Finally,the radiation transmission model of UV detection was established by using the consistency calibration method of UV detection results,and the consistency calibration of the UV imager was carried out.