主动光学薄镜支撑及驱动研究

随着光学遥感器分辨能力的不断提高和口径的不断增大,导致遥感器的重量越来越重,使得载体无法承受.针对此问题,提出了对薄反射镜进行主动支撑的方式,以解决口径大、重量重的问题.利用有限元分析和数学理论相结合的方法在对反射镜施加垂直镜面1g加速度(g=9.80665m/s2为重力加速度)和10℃的温升载荷情况下,对薄反射镜的位...

Support and drive of the active optical thin mirror

With the resolving power of optical remote sensor improving,aperture increasing,the carrier can not afford because of heavier remote sensors.To solve this problem,the way of active support thin mirror is provided to solve large aperture and weight problems.Whether number of displacement actuators and distribution is reasonable for thin mirror support through adopting finite element analysis and mathematical method of combining theory under 1g vertical acceleration imposed on mirror surface and 10℃ temperature rise is calculated.The actuator's displacement is gained when the mirror deformation is smallest.Mirror surface shape corrected is calculated to achieve the optical imaging requirements when the displacements are entered into the finite element displacement of the corresponding node.Φ500mm,3mm thick mirror is analyzed.Mirror deformation is 26μm and 2.4μm with 3 and 9-point support through preliminary calculation,the imaging system can not meet the requirements.Support actuators' space calculated is 72mm using mathematical method.Number of support obtained is107.Mirror surface shape is analyzed through finite element analysis method.PV value is 119nm,RMS value is 31nm.The results meet the system imaging requirements.The results show that the way is feasible to apply mathematical theory and simulation to deformation control of thin mirror.A numerical basis is provided for active optics experiment.