Experimental analysis of the effect of sunlight on 532 nm laser imaging properties

532 nm laser imaging radar can be easily interfered by the sunlight in the imaging process and then it reduces the image SNR. The 532 nm streak tube laser radar was used to carry on the imaging experiment of the multiple scene(groups of buildings) respectively in the day time and night, and the histogram statistics method was used to analyze the distribution of pixel values of laser intensity image and laser range image in the day time and night of the same scene, then the effect of sunlight on the laser imaging properties was analyzed. The experiment results show that the sunlight can increase the brightness and the background/target contrast ratio of laser intensity image, at the same time it can also increase the sky background noise of the range image; and the laser range image has high signal-to-noise ratio at night, but target intensity image contrat ratio is poor.