用于空间外差光谱技术的Offner成像系统设计  

Design of Offner Imaging System Used in Spatial Heterodyne Spectroscopy

作　　者：徐标[1,2,3] 罗海燕[1,3] 熊伟[1,2,3] 胡广骁 沈静[1,2,3] 李志伟[1,3] 施海亮[1,3] 方雪静[1,2,3] 

机构地区：[1]中国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026 [3]中国科学院通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《光学学报》2016年第9期143-148,共6页Acta Optica Sinica

基　　金：国家自然科学基金(41301373);中国科学院GFCX青年基金(CXJJ-16Q136)

摘　　要：Offner反射式成像镜头相比于透射成像镜头具有适用波段范围宽、像差小、相对数值孔径较大、结构简单紧凑以及空间适应性良好的优点。结合空间外差技术特点和要求,给出了一种Offner成像镜头的设计方法和光路结构。该设计通过在出射光路中加入透镜改变缩放比,离轴装配消除像差的方法,可以满足空间外差光谱仪中对定域面干涉条纹进行任意比例缩放的要求。在系统要求数值孔径为0.042、缩放比为-0.8622…1的条件下,给出了设计实例,且点列图最大均方根半径优于1.81μm。最后对该系统进行了像质评价和公差分析,分析结果表明其成像质量可以满足空间外差光谱仪对成像镜头的要求,在现有加工和装配水平条件下可工程化实现。Comparing with traditional transmission imaging lens, the Offner refractive imaging lens has the advantages of wide band, small aberration, relatively large numerical aperture, compact structure and better space adaptability. In combination with the characteristics and requirements of spatial heterodyne spectroscopy （SHS）, the Offner imaging lens and the light path structure are designed. Several pieces of lens are added to the exit light in order to change the pantograph ratio, while the aberration caused by the lens is eliminated by using off-axis assembly, so the requirement of variability in the magnification of interferometric fringe on localization plane on the SHS can be satisfied. Under the precondition of SHS requirements of a 0. 042 numerical aperture and a -0. 8622 ： 1 magnification, the design example is provided, and the biggest root mean square radius of spot diagram is smaller than 1.81 μm. Finally, the imaging quality of the system is evaluated and the tolerance is analyzed, the result shows that the imaging quality can meet the imaging lens requirements of SHS, the Offner imaging of SHS can be achieved in engineering under the level of conventional machining and assembly.

关 键 词：成像系统 空间外差光谱技术 Offner成像镜头 光学设计 像差校正 

分 类 号：O433[机械工程—光学工程]