The application of underwater optics and its development

After concluding the application of under-water optics, the development of under-water laser imaging technology is reviewed. The main types of laser imaging technology are introduced, such as laser scanning imaging, distance selected imaging, and three-dimensional technology. The respective imaging principle, characteristics and update status are presented. Furthermore, the newest detecting technology, such as fiber optic hydrophone, under-water holograph and under-water spectrum detecting technology are described in detail. The recent researching status and new application are included