Integrated Development of Non-coaxial UV Imager Based on Solar-blind UV Radiation Characteristics
Based on the discharge emission spectral characteristics and ultraviolet(UV)radiation transmission properties in the so-lar-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 ob-tained 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 transforma-tion model and weighted averaging method.The integrated prototype of the system achieved a minimum UV sensitivity of 2 x 10-10 pW/cm2.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.
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