Design An Improved Optical System Based On Two-dimensional Line Scanning For Photoelectric Measurement

An optical system using two-dimensional scanning light field for measuring the position and attitude of moving target is optimized based on laboratory findings.The system includes a laser emission module and receive module.A scanning light field with X and Y directions is built up when two sets of line scanning arrangement are placed vertically.The relative position and attitude of aerial target in defined launching coordinate system can be calculated by means of capturing the signals originated from scanning field.The optimized design scheme is determined according to the analysis of design index.1.According to the requirement of subject,the solutions is proposed and the design is completed.The two-dimensional scanning light field is built up by laser emission module when two sets of line scanning subsystem are placed vertically.The simulation results shows that the constructed stable square-shaped scanning field with ±20°/±30°range is highly suitable for measuring moving target in space;and the collimation precision of the laser beam can reach diffraction limit 0.02°,the uniformity of light intensity of line laser more than 90%,the energy utilization ration more than 85%and the edge distortion less than 0.5%are shown in detail,respectively.2.Establish a zoom projection module to cooperate with laser emission module for measuring position and attitude,complete the design and simulation.According to the characteristics of semiconductor laser and the limit of system,shaping the elliptic laser by a uniform diameter light pipe with a cylinder incident surface and a uniform light spot is obtained at the end face.The uniform light spot passes through zoom projection module and a uniform square light field which divergence angle from ±2° to ±20° is achieved.The simulation results in LightTools shows the square spot remain stable with a set distance,the light intensity and the energy utilization both more than 90%.3.±20°/±30° receive lens are designed according to the property parameters of detector and the analysis of receive module's design requirements.The structures of two receive lens both use four pieces of lens,and the receive module has high-performance with F number 0.6.4.Design a reasonable layout of the optical system and establish the model with full use of the system space under a compact premise.Complete the optical-mechanical assembly,debugging and testing,the test results show that the system can realize the design function and the system has simple structure?both applicable for near and far field and a certain practicality.