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12 July 2019 Novel gratings for astronomical observations
N. Ebizuka, T. Okamoto, M. Takeda, T. Hosobata, Y. Yamagata, M. Sasaki, T. Kamizuka, I. Tanaka, T. Hattori, S. Ozaki, W. Aoki
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 1118069 (2019) https://doi.org/10.1117/12.2536144
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
Abstract
We introduce novel gratings for next generation instruments of the TMT (Thirty Meter Telescope), the 8.2 m Subaru telescope, other ground-based and space-borne telescopes. The reflector facet transmission (RFT) grating which is a surface relief grating with sawtooth shaped grating lattice of an acute vertex angle, is developed for the WFOS of the TMT. The hybrid grism (direct vision grating) for the MOIRCSof the 8.2m Subaru Telescope is developed as a prototype of the RFT grating. The volume binary grating is developed for a high-dispersion echelle grism of the nuMOIRCS as the first light instrument of the ULTIMATE Subaru. We also developing a silicon grism for the MIMIZUKU of the 6.5m telescope of the University of Tokyo Atacama Observatory in Chile and a quasi-Bragg (QB) immersion grating.
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N. Ebizuka, T. Okamoto, M. Takeda, T. Hosobata, Y. Yamagata, M. Sasaki, T. Kamizuka, I. Tanaka, T. Hattori, S. Ozaki, and W. Aoki "Novel gratings for astronomical observations", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118069 (12 July 2019); https://doi.org/10.1117/12.2536144
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KEYWORDS
Diffraction gratings
Diffraction
Silicon
Telescopes
Astronomy
Spectrographs
Prototyping
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