title: Joint influences of aerodynamic flow field and aerodynamic heating of the dome on imaging quality degradation of airborne optical systems.
abstract: We investigated the joint influences exerted by the nonuniform aerodynamic flow field surrounding the optical dome and the aerodynamic heating of the dome on imaging quality degradation of an airborne optical system. The Spalart-Allmaras model provided by FLUENT was used for flow computations. The fourth-order Runge-Kutta algorithm based ray tracing program was used to simulate optical transmission through the aerodynamic flow field and the dome. Four kinds of imaging quality evaluation parameters were presented: wave aberration of the exit pupil, point spread function, encircled energy, and modulation transfer function. The results show that the aero-optical disturbance of the aerodynamic flow field and the aerodynamic heating of the dome significantly affect the imaging quality of an airborne optical system.
authors.affiliation: Research Center for Space Optical Engineering, Harbin Institute of Technology, Harbin, China. haosuxiao@gmail.com
authors.forename: Haosu
authors.initials: H
authors.lastname: Xiao
authors.forename: Baojun
authors.initials: B
authors.lastname: Zuo
authors.forename: Yi
authors.initials: Y
authors.lastname: Tian
authors.forename: Wang
authors.initials: W
authors.lastname: Zhang
authors.forename: Chenglong
authors.initials: C
authors.lastname: Hao
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Liu
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Fan
authors.initials: F
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Fan