Optical System Design Of Ship Wake Forward Optical Detecting System

The ship is sailing in the ocean, the rear of the hull will produce a rolled-up large number of bubbles of air curtain with, and this is the so-called wake. Wake is during the moving, within a certain area of the hull’s tail, it will produce special marine waters different from the other waters form significantly, it is difficult to avoid product during the ship moving.The various physical properties of the ship wake play a very important role in the course of the study of the self-guided torpedoes.This paper systematically introduced the optical scattering properties and ship wake detecting system principles and detecting methods, on the basis of which, the optical emitting system and receiving system of the detection system are designed.A laser with a1.2mrad divergence angle and a532nm band is used as a light source in the article. The detecting system has two parts, the emitting system and receiving system. In the emitting system, since the beam waist of the laser is small, and therefore, when the laser is used as the detecting laser, the light beam requires collimated beam expander. The emitting system selects the Galileo telescope system as the collimated beam expander initial structure. In the receiving system, using the lens to converge the light beam, the lens is a Planoconvex lens. As the emitting system and the receiving system requires beam splitting, and the detecting beam and the receiving beam must be linearly polarized laser. Therefore, the polarization splitting prism is used for the laser beam splitting. Simulate the optical path with multiple structures in zemax. So that, the requirements of the optical design will be achieved.