Application of adaptive optics to space-ground large deployable optics system

摘要

The performance of space-ground optical system (optics remote sensing system) depends on two aspects, one is the design, manufacture and assembly of system, the other is the influencing factors which occur during system operation, such as atmospheric turbulence, thermal effect, zero-gravity effect, and flight platform vibration and so on. With the demand for high resolution and multiple spectrum, the aperture of optics system becomes bigger and bigger. In order to overcome the limitation of mirror fabrication and launching, the segmented deployable primary mirror has been developed in large space optical system, which brings super large aperture and high resolution in theory, but also increases wavefront errors of system. So adaptive optics system should be used to detect and correct space environment and optical system errors online. In the paper, the influences of main error sources such as atmospheric turbulence, thermal affect, zero-gravity affect and flight platform vibration on imaging quality of remote sensing system are analyzed in theory, and the quantitative affecting results are put forward by computer simulation. Based on the conclusion of error analysis, the adaptive optical system scheme and working mode are presented, whose feasibility is proved by our adaptive optical emulation system.