Parametric Test And Radiometric Calibration Of The Solar-blind UV Image Intensifier And Intensified CCD

The solar blind UV image detection technology has been applied in a variety of areas, such as corona detection, fire alarm and missile approach warning, regarding its imperviousness to solar clutter and low false alarm rate. The research on this technology starts late in China, and the strict confidentiality of the related research results in the deficiency of this technology comparing to the top in the world. To improve this technology, the development of the UV detection core devices and the quantitative analysis of UV detection are especially important. At present, there are three major difficulties in the parametric test and the radiometric calibration of solar blind UV core devices, which impedes the improvement of solar blind UV image detection technology. First, the standard detectors used in UV radiometric calibration cannot achieve high sensitivity and low calibration uncertainty simultaneously. Secondly, for the completely packaged solar blind UV ICCD, some key parameters such as spectral responsivity can only be inferred from other parameters like gray value or photon numbers. This unavailability of the absolute measurement results in the reduction of test accuracy. Thirdly, the lack of in-depth study on weak UV radiometric calibration limits the application of solar blind UV image detection technology in many areas such as corona detection.Hence, this thesis studies the parametric test and radiometric calibration of the solar blind UV image intensifier and ICCD.A new type of standard detector used in solar blind UV radiometric calibration is established by using the cavity pyroelectric detection system as standard, which achieves high sensitivity and low calibration uncertainty simultaneously. The pyroelectric detector is selected as the core device of the detection system and the main factors that affect its performance are theoretically analyzed. High sensitivity and low calibration uncertainty are achieved by optimizing the structure of the pyroelectric detection system. In addition, the modified function of absolute spectral responsivity of the detection system is derived and the main performance parameters are evaluated. The results demonstrate that the detection system satisfies the requirements of the project. Based on this, the absolute spectral responsivity calibration is achieved, and the relative spectral responsivity gauge for the system and the solar blind UV radiometric calibration standard with a low uncertainty of <1.2% are establishedThe parametric test and the radiometric calibration for the solar blind UV ICCD and image intensifier are performed. The uncertainties of the parametric test and the calibration of the core devices are effectively reduced in this UV spectral. Based on the established low uncertainty standard detector, the parametric test and radiometric calibration for the solar blind image intensifier, ICCD and the associated filters are performed. First, the absolute spectral responsivity calibration and integral responsivity test of the image intensifier are achieved, which has an uncertainty of < 1.6% and < 2.1% respectively. Secondly, the relative spectral responsivity of the ICCD is tested. The reasons for the differences between the test results of the ICCD and the image intensifier are discussed. In addition, the out-off-band cutoff depths for the matching filters of ICCD is tested, whose uncertainty is < 1.1%.To improve the solar blind UV detection technology in the extremely weak UV radiometric calibration of photon counting, the weak solar blind UV radiometric calibration is studied. This may be helpful to solve the problem of the incapability of accurately quantifying the radiation of the target source in corona detection and many others areas. The single photon detector is chosen as a standard for the weak solar blind UV radiometric calibration. The reasons for choosing single photon detector and its working principle are discussed. Moreover, a method for calibrating the absolute quantum efficiency of the single photon detector in the whole spectral range is proposed. The calibration of the relative quantum efficiency of the system in the whole spectral range is thus achieved, whose uncertainty is < 1.7%.