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

Takashi Sukegawa; Yukinobu Okura; Masatsugu Koyama; Tomonao Nakayasu; Yukimasa Suyama

doi:10.1117/12.2629081

29 August 2022 The innovative capabilities of machined free-form mirror for IFU (Integral Field Unit)

Takashi Sukegawa, Yukinobu Okura, Masatsugu Koyama, Tomonao Nakayasu, Yukimasa Suyama

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121880R (2022) https://doi.org/10.1117/12.2629081
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Image spectroscopy is an essential feature in spectroscopic observations. We realized a 30μm 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.

Conference Presentation

Citation Download Citation

Takashi Sukegawa, Yukinobu Okura, Masatsugu Koyama, Tomonao Nakayasu, and Yukimasa Suyama "The innovative capabilities of machined free-form mirror for IFU (Integral Field Unit)", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121880R (29 August 2022); https://doi.org/10.1117/12.2629081

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