Functional degradation of CCD detector irradiated by millisecond pulse laser

Based on a combination of online experimental process detection and off-line experimental results measurement, an experimental system of a millisecond pulse laser irradiating a CCD detector was established, the interacting process between the millisecond pulse laser and the CCD detector was studied, and the formation of different damage effects was analyzed. The experimental results show that: the damage on the CCD detector firstly occurred in the color filter layer, and then extended along the depth direction. The damage sequence of the color filter layer was green, cyan, yellow and magenta color filters, and the color filters were discolored after irradiation. The damaged area from center to outside was green, cyan, burgundy and yellow in the video image; increased the laser energy density to completely destroy partial optical part, the photosensitive layer was exposed in the air, the white part appeared in the middle of the bluish green part in the video image. The connecting position between the exposed photosensitive layer and color filter layer was accompanied with heave and displacement; the changes on the optical part of CCD detector were composed of thermal damage and mechanical damage, and the changes on the electrical part of CCD detector mainly performed noise on the output signal and decrease on signal-noise ratio(SNR).