Study On Laser-induced CCD Detector Vulnerability And Survivability And Fussy Synthetic Evaluation On CCD Jamming Effects

Optical gains as large as one million are used to achieve the high sensitivities required in current electro-optical sensors. These large optical gains make the detector the most susceptible sensor element to laser damage. People concerns that the influence to the quality of CCD camera image under laser irradiation, the laser-induced threshold of CCD detector and the evaluation of laser-induced effects. The program of this paper sponsored by Chinese academy of sciences innovation engineering fund. This paper includes that :1, The principle of CCD working was introduced. The phenomenon of CCD saturate was analyzed with the CCD electro-optical characteristics numerical model. The thermal model of CCD material irradiated by pulse and CW laser was presented and discussed. The temperature profile of CCD material irradiated by pulse and CW laser was solved with numerical method. It was introduced in brief that the theory of fuzzy mathematic and fuzzy synthetic evaluation. 2, The influence to the quality of array CCD camera under the irradiation of CW and pulse laser was investigated experimentally .The result of experiment shows that the CCD easily damaged by pulse laser to CW laser. The thresholds of KA-320 model CCD saturation and sub-damage were measured. The relation between area of CCD saturation and 0.632μm ,1.06μm laser power/energy was measured . The CCD camera was disturbed by strong radiation from laser outside the field of view in experiment. The relation between the area of CCD saturation and off-axis angle was measured. The different phenomena of CCD disturbed by different frequency pulse laser were observed. In experiment a CCD image tracking simulation system was disturbed effectively when tracking target region jammed by laser . 3, By utilizing the theory of fuzzy synthetic evaluation, the laser-induced effects on CCD camera were investigated. The fuzzy evaluation model was present and applied in experiment of CCD disturbed by pulse and CW laser. The result of fuzzy synthetic evaluation is consistent with the experiment.