紧凑型自由曲面离轴三反系统设计
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摘要
针对小型化反射式光学系统的设计要求,采用新型的离轴三反光路形式和自由曲面,实现了F#为1.8,对角线视场角7.5°的紧凑型自由曲面离轴三反系统,光线在系统内多次重叠,系统波像差全视场平均值为0.017λ(λ=10μm)。相比非球面离轴三反系统,该系统具有体积小、透过率高、大视场、无中心遮拦、多波段成像等优点。
Aiming at the design requirement of miniature reflective optical system,the new off-axis three-mirror optic path and freeform surface were adopted,the compact freeform three-mirror was realized with 1.8 F#and 7.5°diagonal field of view(FOV).The light overlaps multiple times in the system,and the full FOV average of the system wave aberration is 0.017λ(λ=10μm).Compared with the aspherical off-axis three-mirror system,the system has the advantages of small size,high transmittance,large FOV,no central obscuration,and multi-band imaging,etc.
Aiming at the design requirement of miniature reflective optical system,the new off-axis three-mirror optic path and freeform surface were adopted,the compact freeform three-mirror was realized with 1.8 F#and 7.5°diagonal field of view(FOV).The light overlaps multiple times in the system,and the full FOV average of the system wave aberration is 0.017λ(λ=10μm).Compared with the aspherical off-axis three-mirror system,the system has the advantages of small size,high transmittance,large FOV,no central obscuration,and multi-band imaging,etc.
引文
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[6] ZHU Jun,HOU Wei,ZHANG Xiaodong,et al.Design of a low F-number freeform off-axis three-mirror system with rectangular fieldof-view[J].Journal of Optics,2015,17(1):015605.
[2] KYLE F,GREGG E D,KEVIN P T.Assembly of a freeform off-axis optical system employing threeφ-polynomial Zernike mirrors[J].Optics Letters,2014,39(10):2896-2899.
[3] KYLE F,JANNICK P,KEVIN P T.A new family of optical systems employingφpolynomial surfaces[J].Optics Express,2011,19(22):21919-21928.
[4] TAKAYUKI N,YASUHISA T.Configuration of an off-axis three-mirror system focused on compactness and brightness[J].Applied Optics,2005,44(5):776-783,
[5] OHDE H,NAGATA T.Optical design,fabrication and evaluation of optical systems using free-shaped prism[J].SPIE,2007,6834:1-11.
[6] ZHU Jun,HOU Wei,ZHANG Xiaodong,et al.Design of a low F-number freeform off-axis three-mirror system with rectangular fieldof-view[J].Journal of Optics,2015,17(1):015605.