This paper analyses the dynamic residual aberrations of a conformal optical system and introduces adaptive optics （AO） correction technology to this system. The image sharpening AO system is chosen as the correction...This paper analyses the dynamic residual aberrations of a conformal optical system and introduces adaptive optics （AO） correction technology to this system. The image sharpening AO system is chosen as the correction scheme.Communication between MATLAB and Code V is established via ActiveX technique in computer simulation.The SPGD algorithm is operated at seven zoom positions to calculate the optimized surface shape of the deformable mirror.After comparison of performance of the corrected system with the baseline system,AO technology is proved to be a good way of correcting the dynamic residual aberration in conformal optical design.展开更多
Stray light analysis of a three-mirror spatial optical system is presented.The entrance pupil diameter （EPD） of the system is 320 mm,the effective focal length（EFL） is 2809 mm,and the field of view（FOV） is 1...Stray light analysis of a three-mirror spatial optical system is presented.The entrance pupil diameter （EPD） of the system is 320 mm,the effective focal length（EFL） is 2809 mm,and the field of view（FOV） is 1°×0.5°.Its walls are coated with extinction paint（the absorption coefficient of which is 97%）.The point source transmittance（PST） of the system is thus reduced by up to two orders of magnitude.Moreover, this technique makes it feasible to block the stray light coming from outside of the FOV by increasing the outer baffle length of the system.Adding an inner baffle to both the primary and the secondary mirrors helps not only to block the stray light coming from outside of the FOV but also to decrease the length of the outer baffle.Simulation results show that the PST values are less than 10^（-10） when the off-axis angle is larger than 9°.The stray light is also suppressed effectively by placing a glare stop at the first imaging plane of Cassegrain telescope.It is surprising that the PST value is 10^（-14） when the off-axis angle is 2°with the placement of glare stop at the first image plane.展开更多
基金Project supported by the National High Technology Research and Development Program of China (Grant No 2006AA012339)
文摘This paper analyses the dynamic residual aberrations of a conformal optical system and introduces adaptive optics （AO） correction technology to this system. The image sharpening AO system is chosen as the correction scheme.Communication between MATLAB and Code V is established via ActiveX technique in computer simulation.The SPGD algorithm is operated at seven zoom positions to calculate the optimized surface shape of the deformable mirror.After comparison of performance of the corrected system with the baseline system,AO technology is proved to be a good way of correcting the dynamic residual aberration in conformal optical design.
基金supported by the National Science and Technology Major Project under Grant No. 2009ZX02204-007.
文摘Stray light analysis of a three-mirror spatial optical system is presented.The entrance pupil diameter （EPD） of the system is 320 mm,the effective focal length（EFL） is 2809 mm,and the field of view（FOV） is 1°×0.5°.Its walls are coated with extinction paint（the absorption coefficient of which is 97%）.The point source transmittance（PST） of the system is thus reduced by up to two orders of magnitude.Moreover, this technique makes it feasible to block the stray light coming from outside of the FOV by increasing the outer baffle length of the system.Adding an inner baffle to both the primary and the secondary mirrors helps not only to block the stray light coming from outside of the FOV but also to decrease the length of the outer baffle.Simulation results show that the PST values are less than 10^（-10） when the off-axis angle is larger than 9°.The stray light is also suppressed effectively by placing a glare stop at the first imaging plane of Cassegrain telescope.It is surprising that the PST value is 10^（-14） when the off-axis angle is 2°with the placement of glare stop at the first image plane.
