The innovative capabilities of machined free-form mirror for IFU (Integral Field Unit)

被引：1
|
作者：
Sukegawa, Takashi [1 ]
Okura, Yukinobu [1 ]
Koyama, Masatsugu [1 ]
Nakayasu, Tomonao [1 ]
Suyama, Yukimasa [1 ]
机构：
[1] Canon Inc, Ohta Ku, 30-2,Shimomaruko 3 Chome, Tokyo 1468501, Japan
来源：
ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION V | 2022年 / 12188卷
关键词：
IFU; multi; mirror; image; machining; free-form; roughness; flat; monolithic;
D O I：
10.1117/12.2629081
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Image spectroscopy is an essential feature in spectroscopic observations. We realized a 301am wide slicer by cutting in 2016, showing a new possibility of IFU by cutting. Our machine is capable of 3D machining and has the accuracy to machine gratings. By utilizing this function, it is possible to produce not only flat slicers but also slicers with free curved surfaces. We have fabricated a prototype of a slicing mirror with a free-form surface. Of course, the multi-faceted mirror is an integral part of the structure. It is not easy and innovative to realize such a structure with a wall between adjacent mirrors due to the difference in tilt angle. We can obtain a surface roughness of less than 2nm (RMS) by cutting alone. The cutting potential for innovative extension of IFU degrees of freedom is introduced in this presentation.
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页数：7
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