The Design Of Opto-mechanical Structure Based On Optical Node Characteristic Optical Axis Calibration System

The optical axis is an ideal reference axis specified in the optical design,and it is also an important indicator of the actual optical system.The measurement of the spatial angle is based on the optical axis,especially the measurement of high-precision spatial position,small deviation of the optical axis will affect the measurement accuracy of the optical system.Aiming at the problems that the optical axis of the transmission optical system cannot be calibrated directly by the existing technology,and the adjustment of the self-collimating reference can not be realized by the existing technology,and the optical axis reference can not be transferred and reconstructed,a calibration method of the optical axis is proposed based on the equivalent node characteristics in dynamic optics,and the simulation verification is carried out by Trace Pro software.On the basis of studying the calibration methods of optical axis at home and abroad,the overall structure of the optical axis calibration system and the relationship between its parts are analyzed,and the two-way mutual standard double self-collimating collimator with microscope objective and centering are proposed.Execute the overall design plan of the structure and determine the design index of the optical axis calibration system.Modular design idea is adopted to divide the structural design tasks,and the optical and structural design of the transmitting module,imaging receiver module and attitude adjustment module in the optical axis calibration system is carried out.Finally,the laboratory equipment is used to build an experimental platform and carry out confirmatory experiments.The various factors affecting the optical axis calibration are combined with errors.The results show that the optical axis calibration accuracy of the bidirectional cross-standard double self-collimating collimator designed in this paper with the microscope objective lens and the centering execution structure is less than 10",which meets the requirements The adjustment and positioning of the focal plane components of the precision photoelectric system provide the requirements for the orientation reference,which can be used in the assembly and testing of a variety of photoelectric systems,such as missile seekers,miniature lenses for large-scale integrated circuit manufacturing,high-precision star sensors,and photoelectric measurement Equipment and other fields provide an auxiliary means for testing and adjusting.