Dr. Takahiro Nagayama Profile

Dr. Takahiro Nagayama

at Kagoshima Univ

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

The South Africa Near-Infrared Doppler (SAND) instrument: design and fabrications

Aoi Takahashi, Takayuki Kotani, Masayuki Kuzuhara, Takeru Nakajima, Riku Urago, Kou Hosokawa, Shotaro Tada, Motohide Tamura, Jun Nishikawa, Akitoshi Ueda, Takuya Takarada, Teruyuki Hirano, Takuma Kokusho, Eiko Kozaki, Takahiro Nagayama, Takahiro Sumi, Daisuke Suzuki, Hibiki Yama, Tomoyasu Yamamuro

Proceedings Volume 13096, 1309669 (2024) https://doi.org/10.1117/12.3018194

KEYWORDS: Stars, Telescopes, Spectrographs, Sand, Mirrors, Planets, Spectral resolution, Signal to noise ratio, Optical alignment, Equipment

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

kSIRIUS: a simultaneous JHKs camera for the Kagoshima University 1m telescope using newly developed Japanese InGaAs array detectors

Takahiro Nagayama, Hidehiko Nakaya

Proceedings Volume 13096, 130963I (2024) https://doi.org/10.1117/12.3016593

KEYWORDS: Sensors, Detector arrays, Telescopes, Cameras, Indium gallium arsenide, Detector development, CMOS sensors, Beam splitters

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

Development of a new near-infrared spectrometer for the IRSF telescope

Takuma Kokusho, Yuki Fujii, Kota Ogihara, Takahiro Nagayama, Takayoshi Kusune, Hidehiro Kaneda, Hidehiko Nakaya

Proceedings Volume 13096, 130967J (2024) https://doi.org/10.1117/12.3016577

KEYWORDS: Spectroscopy, Telescopes, Sensors, Indium gallium arsenide, Stars, Spectral resolution, Equipment, Infrared telescopes, Prisms, Observatories

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Proceedings Article | 28 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

The South Africa Near-Infrared Doppler (SAND) instrument: concept and instrument design

Aoi Takahashi, Takayuki Kotani, Jun Nishikawa, Akitoshi Ueda, Masayuki Kuzuhara, Motohide Tamura, Takahiro Nagayama, Mikio Kurita, Takahiro Sumi, Tomoyasu Yamamuro, Bun'ei Sato, Teruyuki Hirano, Masashi Omiya

Proceedings Volume 11447, 114473E (2020) https://doi.org/10.1117/12.2560342

KEYWORDS: Doppler effect, Stars, Planets, Telescopes, Spectroscopy, Velocity measurements, Infrared radiation, Near infrared, Infrared telescopes, Active optics

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

New narrow-band filter system for the IRSF 1.4m telescope

Kumiko Morihana, Takahiro Nagayama, Masahiro Tsujimoto, Mitsuyoshi Yamagishi, Ken Ebisawa

Proceedings Volume 11447, 11447A1 (2020) https://doi.org/10.1117/12.2576307

KEYWORDS: Telescopes, Bandpass filters, Transmittance, Infrared telescopes, Optical filters, Infrared radiation, Infrared imaging, Imaging systems, Image filtering, Absorption filters

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Proceedings Article | 5 August 2016 Paper

Paper

Low temperature performance of a commercially available InGaAs image sensor

Hidehiko Nakaya, Yutaka Komiyama, Nobunari Kashikawa, Tomohisa Uchida, Takahiro Nagayama, Michitoshi Yoshida

Proceedings Volume 9915, 99151O (2016) https://doi.org/10.1117/12.2231169

KEYWORDS: Sensors, Indium gallium arsenide, Image sensors, Astronomy, Photonics, Quantum efficiency, Electronics, Cadmium sulfide, Readout integrated circuits, Photons

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Proceedings Article | 22 July 2016 Paper

Paper

A local attenuation filter for accurate photometry of near-infrared bright stars

Takahiro Nagayama

Proceedings Volume 9912, 991237 (2016) https://doi.org/10.1117/12.2232593

KEYWORDS: Signal attenuation, Photometry, Transparency, Astronomy, Stars, Optical filtering, Telescopes, Near infrared, Cameras, Infrared radiation

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Proceedings Article | 23 July 2014 Paper

Paper

Evaluation of InGaAs 640x512 detector array manufactured by Chunghwa Leading Photonics Tech

Takahiro Nagayama, Nami Takeuchi, Takuma Kokusho, Asa Yamanaka, Miho Nishiyama, Hidehiro Kaneda

Proceedings Volume 9154, 91541O (2014) https://doi.org/10.1117/12.2055084

KEYWORDS: Sensors, Staring arrays, Near infrared, Multiplexers, Astronomy, Temperature metrology, Photonics, Indium gallium arsenide, Manufacturing, Cadmium sulfide

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Proceedings Article | 24 September 2012 Paper

Paper

Design and status of an optical and near-infrared spectrometer for the IRSF 1.4m Telescope

Takahiro Nagayama, Mikio Kurita, Masaru Kino, Daisuke Mori, Takuma Kokusho

Proceedings Volume 8446, 844671 (2012) https://doi.org/10.1117/12.926029

KEYWORDS: Near infrared, Spectroscopy, Telescopes, Prisms, Channel projecting optics, Sapphire, Mirrors, Sensors, Spectral resolution, Spherical lenses

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Proceedings Article | 9 July 2008 Paper

Paper

Daisy chain expandable readout system for infrared arrays

Takahiro Nagayama, Kentaro Haraguchi

Proceedings Volume 7014, 70146R (2008) https://doi.org/10.1117/12.789194

KEYWORDS: Data conversion, Clocks, Data acquisition, Staring arrays, Infrared radiation, Analog electronics, Infrared imaging, Sensors, Infrared detectors, Logic

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Proceedings Article | 9 July 2008 Paper

Paper

Experiment of Wide Field Cryogenic Telescope II (WFCT II) at Sutherland, South African Astronomical Observatory

Kentaro Haraguchi, Mikio Kurita, Shuji Sato, Weilai Gu, Tetsuya Nagata, Takahiro Nagayama, Takahiro Zenno, Daisuke Kato

Proceedings Volume 7014, 70146E (2008) https://doi.org/10.1117/12.789020

KEYWORDS: Telescopes, Astronomy, Cryogenics, Sensors, Observatories, Mirrors, Astronomical telescopes, Neodymium, Aluminum, Optical filters

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Proceedings Article | 11 July 2006 Paper

Paper

A high-spectral resolution tandem Fabry-Perot spectrometer for 17-micrometer wavelength

Takahiro Nagayama, Tetsuya Nagata, Takahiro Zenno, Chie Nagashima, Mikio Kurita, Shuji Sato, Masanori Kobayashi, Kentaro Haraguchi, Mitsunobu Kawada, Hirokazu Kataza, Yoshiko Okamoto

Proceedings Volume 6269, 626948 (2006) https://doi.org/10.1117/12.671463

KEYWORDS: Fabry–Perot interferometers, Sensors, Spectroscopy, Telescopes, Spectral resolution, Actuators, Staring arrays, Transparency, Hydrogen, Metals

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Proceedings Article | 28 June 2006 Paper

Paper

SIRPOL: a JHK_s-simultaneous imaging polarimeter for the IRSF 1.4-m telescope

Ryo Kandori, Nobuhiko Kusakabe, Motohide Tamura, Yasushi Nakajima, Takahiro Nagayama, Chie Nagashima, Jun Hashimoto, Jim Hough, Shuji Sato, Tetsuya Nagata, Akika Ishihara, Phil Lucas, Misato Fukagawa

Proceedings Volume 6269, 626951 (2006) https://doi.org/10.1117/12.670967

KEYWORDS: Polarimetry, Polarization, Wave plates, Stars, Cameras, Telescopes, Polarizers, Astronomy, Infrared radiation, Sensors

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Proceedings Article | 7 March 2003 Paper

Paper

SIRIUS: a near-infrared simultaneous three-band camera

Takahiro Nagayama, Chie Nagashima, Yasushi Nakajima, Tetsuya Nagata, Shuji Sato, Hidehiko Nakaya, Tomoyasu Yamamuro, Koji Sugitani, Motohide Tamura

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460770

KEYWORDS: Telescopes, Mirrors, Clocks, Cameras, Near infrared, Data acquisition, Infrared imaging, Optical filters, Camera shutters, Astronomy

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Proceedings Article | 24 December 2002 Paper

Paper

Science with SIRIUS: simultaneous-color infrared imager for unbiased surveys

Yasushi Nakajima, Motohide Tamura, Chie Nagashima, Takahiro Nagayama, Daisuke Baba, Koji Sugitani, Hidehiko Nakaya, Tetsuya Nagata, Daisuke Kato, Mikio Kurita, Shuji Sato, Zhibo Jiang, Yoshifusa Ita, Toshihiko Tanabe, Yoshikazu Nakata, Takashi Naoi, Yumiko Oasa

Proceedings Volume 4836, (2002) https://doi.org/10.1117/12.456991

KEYWORDS: Stars, Telescopes, Clouds, Galactic astronomy, Observatories, Near infrared, Infrared radiation, Imaging systems, Astronomy, Space telescopes

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Showing 5 of 15 publications

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