Grism and immersion grating for space telescope

Ebizuka, Noboru; Oka, Kiko; Yamada, Akira; Ishikawa, Mami; Kashiwagi, M.; Kodate, Kashiko; Hirahara, Yasuhiro; Sato, Shuji; Kawabata, Koji S.; Wakaki, Moriaki; Morita, Shinya; Simizu, Tomoyuki; Yin, Shao Hui; Omori, Hithoshi; Iye, Masanori

doi:10.1117/12.2308014

Cited by 4 publications

References 23 publications

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Optical spectrum analyzers and typical applications in astronomy and remote sensing

Yan,

Chen,

Yang

et al. 2023

Review of Scientific Instruments

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Scientists are increasingly relying on astronomical and remote sensing technologies to gain deeper insights into the Earth and the universe. In these fields, the optical spectrum analyzer (OSA) or spectrometer plays a pivotal role. This Review offers a comprehensive overview of the fundamental principles, key parameters, and applications of various branches of traditional OSAs, including prisms, gratings, interferometers, tunable filters, and reconstructive spectrometers. We specifically focus on their latest major applications in astronomy and remote sensing. Additionally, we present a mathematical model of the generalized reconstructive spectrometer and provide a summary of its principles pertaining to spectral mapping, reconstruction, and imaging. Despite its limited aperture and étendue, the reconstructive spectrometer holds great potential for future use in astronomy and remote sensing due to its compact size and exceptional ultrahigh spectral resolution.

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Optical spectrum analyzers and typical applications in astronomy and remote sensing

Yan,

Chen,

Yang

et al. 2023

Review of Scientific Instruments

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SiC ultralight mirror for large space telescope and for extremely huge ground-based telescope II

et al. 2004

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Novel immersion grating, VPH grating and quasi-Bragg grating

et al. 2006

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We have successfully fabricated germanium immersion gratings with resolving power of 45,000 at 10 µm by using a nano precision 3D grinding machine and ELID (ELectrolytic In-process Dressing) method. However the method spends large amount of machine times. We propose grooves shape with a new principle for a solid grating, which achieves high performance and lower cost.We have developed volume phase holographic (VPH) grisms with zinc selenide (ZnSe) prisms for spectrograph of the Subaru Telescope and the other telescopes. While a VPH grism with high index prisms achieves higher dispersion, diffraction efficiency of VPH grating decreases toward higher orders. A "quasi-Bragg grating" which inherits advantage of a VPH grating achieves high diffraction efficiency toward higher orders.Wavelength tuners with a pair of counter-rotation prisms for a VPH and quasi-Bragg grating obtain high diffraction efficiency over wide wavelength range. The novel immersion grating, VPH grism with high index prisms, quasi-Bragg grating and wavelength tuners dramatically reduce volumes of astronomical spectrographs.

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Grism and immersion grating for space telescope

Cited by 4 publications

References 23 publications

Optical spectrum analyzers and typical applications in astronomy and remote sensing

Optical spectrum analyzers and typical applications in astronomy and remote sensing

SiC ultralight mirror for large space telescope and for extremely huge ground-based telescope II

Novel immersion grating, VPH grating and quasi-Bragg grating

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