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首页> 外文会议>International symposium on advanced optical manufacturing and testing technologies >Analysis and Design of Coaxial Three-Mirror Anastigmat with Long Effective Focal Length and Full Two-Dimensional Field
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Analysis and Design of Coaxial Three-Mirror Anastigmat with Long Effective Focal Length and Full Two-Dimensional Field

机译：有效焦距长且具有完整二维场的同轴三反射镜吻合分析与设计

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摘要

There is a race to develop spaceborne high-resolution video cameras since Skybox's success. For low manufacture cost and adaption to micro and small satellites, it is urgent to design and develop compact long focal length optical system with not only small volume, light weight and easy implementation, and also two-dimensional field. Our focus is on the Coaxial Three-Mirror Anastigmat (CTMA) with intermediate real image for its no need outer hood and compactness and for its easy alignment, low-order aspheric surface and low cost. The means to deflect its image space beam for accessibility of focal plane array detector and to eliminate its inherent secondary obscuration from its primary mirror central hole and deflection flat mirror is discussed. The conditions to satisfy the above-mentioned requirements are presented with our derived relationship among its optical and structural parameters based on Gaussian optics and geometry. One flat mirror near its exit pupil can be used to deflect its image plane from its axis. And its total length can be decreased with other some flat mirrors. Method for determination of its initial structure with the derived formulae is described through one design example. Furthermore, optimized CTMA without secondary obscuration and with effective focal length (EFFL) of 10m is reported. Its full field, F-number and total length are respectively 1.1°×1°, F/14.3, and one eighth of its EFFL. And its imaging quality is near diffraction limit.
机译：自从Skybox成功以来，就一直在争夺开发太空高分辨率视频摄像机的竞赛。为了降低制造成本并适应微型和小型卫星，迫切需要设计和开发紧凑的长焦距光学系统，该系统不仅体积小，重量轻，易于实现，而且具有二维场。我们的重点是具有中间真实图像的同轴三反射镜Anastigmat（CTMA），因为它不需要外部遮光罩且结构紧凑，并且易于对准，低阶非球面表面且成本低廉。讨论了偏转其图像空间光束以使焦平面阵列检测器可及并消除其固有的次要遮挡的方法，该方法是从其主镜中央孔和偏转平面镜中消除的。基于高斯光学和几何学，我们推导了满足上述要求的条件，并给出了其光学和结构参数之间的关系。靠近其出射光瞳的一个平面镜可用于将其像平面从其轴偏转。并且它的总长度可以用其他一些平面镜来减小。通过一个设计实例描述了用导出的公式确定其初始结构的方法。此外，还报告了优化的CTMA，没有二次遮盖，有效焦距（EFFL）为10m。它的全视场，F数和总长度分别为1.1°×1°，F / 14.3和其EFFL的八分之一。并且其成像质量接近衍射极限。

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