Development of micro image slicer of integral field unit for spaceborne solar spectrograph
Development of micro image slicer of integral field unit for spaceborne solar spectrograph
复制标题
星载太阳摄谱仪整体现场单元微图像切片机的研制
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Tsuneta
中科院分区：
文献类型：
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作者：
Y. Suematsu;T. Sukegawa;Y. Okura;T. Nakayasu;Y. Enokida;M. Koyama;K. Saito;S. Ozaki;S. Tsuneta
提出了一种克服金属反射镜光学局限性的图像切片集成场单元（IFU）的光学设计和制造方法。我们的IFU由45个排列的高窄平面金属镜组成的微图像切片器和一个由离轴圆锥球组成的伪瞳孔镜像阵列，形成了重新排列的切片器图像的三个伪狭缝。一个IFU原型展示了它们的光学质量足够高，可以用于可见光光谱仪。每个切片镜长1.58 mm，宽30μm，表面粗糙度rms < 1 nm，边缘锐度< 0.1μm等。该IFU体积小，可以在没有任何移动机构和前光学的多缝光谱仪中实现，其中一个缝是真实的，其他缝是来自IFU的伪缝。这些特性非常适合搭载在太空中的摄谱仪，比如下一个日本太阳任务solar - c。
We present an innovative optical design for image slicer integral field unit (IFU) and manufacturing method which overcome optical limitation of metallic mirrors. Our IFU consists of micro image slicer of 45 arrayed highly-narrow flat metallic mirrors and a pseudo pupil mirror array of off-axis conic aspheres forming three pseudo slits of re-arranged slicer images. A prototype IFU demonstrates their optical quality high enough for a visible light spectrograph. The each slicer mirror is 1.58 mm in length and 30μm in width with surface roughness < 1 nm rms, edge sharpness < 0.1μm, etc. This IFU is small-sized and can be implemented in a multi-slit spectrograph without any moving mechanism and fore optics in which one slit is real and the others are of pseudo slits from the IFU. Those properties are well suitable for space-borne spectrograph to be aboard such as a next Japanese solar mission SOLAR-C.