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Square telescope and apodized coronagraph for imaging nonsolar planets and the like

机译:方形望远镜和变迹日冕仪,用于成像非太阳系行星等

摘要

A new coronagraph sufficiently increases the contrast ratio between the infrared image of a nonsolar star and a possible orbiting nonsolar planet to make imaging of such a planet possible. The coronagraph is used with an infrared telescope system having a square objective or aperture. Unwanted stellar irradiance is diffracted orthogonally by the square telescope aperture or objective so that a coronagraph apodizer in the first focal plane in the shape of crossed arms, and a coronagraph Lyot stop in the pupil plane with a square opening, stop most of the on-axis direct and diffracted stellar energy while allowing most of the planet irradiance to pass through the coronagraph. The discarded light reflected from the back of the apodizer can be used to provide information concerning piston and tilt errors of individual segments of a segmented telescope so that an array of correcting piston-tilt mirrors can be controlled to align the telescope.
机译:新的日冕仪可以充分提高非太阳星的红外图像与可能在轨道上运行的非太阳行星之间的对比度,从而使这种行星的成像成为可能。日冕仪与具有方形物镜或孔径的红外望远镜系统一起使用。不需要的恒星辐照度会通过方形望远镜的光圈或物镜正交衍射,从而使第一个焦平面中的日冕切趾器呈交叉臂状,而日冕仪的Lyot会在瞳孔平面中停止,并具有一个正方形的开口,从而会停止大部分轴直接和衍射恒星能量,同时允许大多数行星辐照度穿过日冕仪。从切趾器背面反射的废弃光可用于提供有关分段式望远镜各个部分的活塞和倾斜误差的信息,从而可以控制一系列校正活塞-倾斜镜以对准望远镜。

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