Fuerschbach Kyle, Rolland Jannick P, Thompson Kevin P
The Institute of Optics, University of Rochester, 275 Hutchinson Road, Rochester, NY 14627, USA.
Opt Express. 2011 Oct 24;19(22):21919-28. doi: 10.1364/OE.19.021919.
Unobscured optical systems have been in production since the 1960s. In each case, the unobscured system is an intrinsically rotationally symmetric optical system with an offset aperture stop, a biased input field, or both. This paper presents a new family of truly nonsymmetric optical systems that exploit a new fabrication degree of freedom enabled by the introduction of slow-servos to diamond machining; surfaces whose departure from a sphere varies both radially and azimuthally in the aperture. The benefit of this surface representation is demonstrated by designing a compact, long wave infrared (LWIR) reflective imager using nodal aberration theory. The resulting optical system operates at F/1.9 with a thirty millimeter pupil and a ten degree diagonal full field of view representing an order of magnitude increase in both speed and field area coverage when compared to the same design form with only conic mirror surfaces.
自20世纪60年代以来，无遮拦光学系统就已投入生产。在每种情况下，无遮拦系统都是一种本质上具有旋转对称性的光学系统，带有偏心孔径光阑、倾斜输入场或两者皆有。本文介绍了一类全新的真正非对称光学系统，这类系统利用了通过引入慢伺服控制到金刚石加工中而实现的新制造自由度；其表面相对于球面的偏差在孔径内沿径向和方位角都有所变化。通过使用节点像差理论设计一个紧凑的长波红外（LWIR）反射成像仪，展示了这种表面表示的优势。与仅具有圆锥镜面的相同设计形式相比，所得光学系统在F/1.9的光圈下工作，光瞳直径为30毫米，对角线全视场为10度，在速度和视场覆盖面积方面都提高了一个数量级。
