平顶正弦相位板星冕仪

发布时间：2018-11-26 06:44

【摘要】：理论上提出了平顶正弦相位板星冕仪,该星冕仪可作为正弦相位板星冕仪和六平台相位板星冕仪的推广形式。平顶正弦相位板具有角向的双周期结构,每个周期中都包含两个平顶的半正弦区域和一个平坦区域。解析地推导了该相位板的宽带工作条件。在这个宽带工作条件的一端,这个相位板可以退化为正弦相位板;在另一端,这个相位板可以退化为六平台相位板。数值计算结果表明,平顶正弦相位板星冕仪与这两种特例情况一样,具有良好的消色差能力。
[Abstract]:In this paper, a flat-top sinusoidal phase plate coronation instrument is proposed, which can be used as an extension of the sine phase plate coronation instrument and the six-platform phase plate coronation instrument. The flat top sinusoidal phase plate has a biperiodic structure with an angular direction. Each period consists of two half-sinusoidal regions with flat top and a flat region. The broadband working conditions of the phase plate are derived analytically. At one end of the broadband working condition, the phase plate can degenerate into a sinusoidal phase plate, and at the other end, the phase plate can degenerate into a six-platform phase plate. The numerical results show that the flat-top sinusoidal phase plate coronation instrument has good achromatic ability as in these two special cases.
【作者单位】： 上海大学理学院物理系;
【分类号】：P111.4
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本文编号：2357619