Study Of Beam-expanding System For Ground-based Laser Launch Telescope

With the rapid development of laser technology and laser,the laser is more widely used in various fields.Laser range finder is one of the important application directions.Rapid and accurate positioning of artificial satellites is the main function of artificial satellite range finder.The laser emission telescope is a key functional unit of the ground-based laser positioning subsystem.After the infrared laser pulse is launched by the laser emission telescope,received by a CCD on a geostationary satellites.After processing,the position deviation information is fed back to the monitoring station.Adjusts its orbital position based on the information it acquires,established a communication system between satellites and grounds.This paper studies the design of a beam expander system for alt-az laser telescopes,the processing and detection of optical components,and the installation and testing of optical systems.Alt-az laser telescope expansion beam system effective aperture is 300mm,the working wavelength is 10.6 ?m and the detection wavelength is 0.6328 ?m.According to the design index of the system,using the off-axis aspherical reflective structure,calculate the system initial structure parameters.Use the optical design software zemax to optimize the final design results.Solve the problem of infrared and divergence angles using two-stage beam expansion system.Introduce Coude optical path to realize the scanning of two-axis system.Study the detection methods in off-axis parabolic mirror processing,calculate the best comparison radius of the spherical surface and the quantity of grinding.Formulate suitable processing inspection solutions,verify the feasibility of detection scheme,complete the processing of the primary and secondary mirrors.Based on the self-collimation detection,complete system assembly and testing,the RMS of primary mirror is 0.0288?,@632.8nm,the Wave aberration of the optical system is 0.131?,@632.8nm.Aiming at the problem of rotation,Design a dynamic detection method.According to the actual adjustment results,establishing a space Cartesian coordinate system,use the maximum offset to calculate error of the two-axis orthogonality.