Mr. Toshihiro Tsuzuki Profile

Toshihiro Tsuzuki

Research Engineer at National Astronomical Observatory of Japan

SPIE Involvement:

Author

Area of Expertise:

Optical design , Optical analysis , Optical evaluation , optomechanical systems

Profile Summary

Toshihiro Tsuzuki, an optical engineer at the Advanced Technology Center of the National Astronomical Observatory of Japan (NAOJ), holds B.S. and M.S. degrees in Physics from Osaka University. With over three years of experience in optical design and consumer lens evaluation at Olympus, he is deeply involved in various astronomical instrument development projects at NAOJ. His contributions encompass a range of instruments, including TMT/IRIS, TMT/WFOS, TAO/SWIMS(IFU), Seimei/TriCCS(IFU), KAGRA, Nobeyama45m, Greenland Telescope, Antarctica Telescope, SOLAR-C(EUVST), JASMINE, SUNRISE III, and sounding rockets like CLASP1/CLASP2. In 2018, Toshihiro earned the "Optical Design Award" from the Optical Society of Japan's Optical Design Group, a testament to his innovation in optical engineering. His current research focus lies in optical design, analysis, and the evaluation of optomechanical systems.

Publications (27)

SPIE Journal Paper | 4 March 2024 Open Access

Open Access

Development of a near-infrared wide-field integral field unit by ultra-precision diamond cutting

Kosuke Kushibiki, Shinobu Ozaki, Masahiro Takeda, Takuya Hosobata, Yutaka Yamagata, Shin-ya Morita, Toshihiro Tsuzuki, Keiichi Nakagawa, Takao Saiki, Yutaka Ohtake, Kenji Mitsui, Hirofumi Okita, Yutaro Kitagawa, Yukihiro Kono, Kentaro Motohara, Hidenori Takahashi, Masahiro Konishi, Natsuko Kato, Shuhei Koyama, Nuo Chen

JATIS, Vol. 10, Issue 01, 015004, (March 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.1.015004

KEYWORDS: Mirrors, Telescopes, Image quality, Mirror surfaces, Vignetting, Surface roughness, Engineering, Stars, Optical components, Off axis mirrors

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Diamond machining of two-in-one optical element including slice mirror array for near-infrared integral-field spectrograph

Masahiro Takeda, Kousuke Kushibiki, Takuya Hosobata, Yutaka Yamagata, Shinya Morita, Takao Saiki, Keiichi Nakagawa, Yutaka Ohtake, Kentaro Motohara, Shinobu Ozaki, Toshihiro Tsuzuki, Hidenori Takahashi, Masahiro Konishi

Proceedings Volume 12188, 121882X (2022) https://doi.org/10.1117/12.2625703

KEYWORDS: Mirrors, Optical components, Diamond machining, Surface roughness, X-rays, X-ray computed tomography, Spectrographs, Aluminum, Astronomy

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Development status of a near-infrared integral field unit SWIMS-IFU

Kosuke Kushibiki, Shinobu Ozaki, Masahiro Takeda, Takuya Hosobata, Yutaka Yamagata, Shinya Morita, Keiichi Nakagawa, Takao Saiki, Yutaka Ohtake, Toshihiro Tsuzuki, Kenji Mitsui, Hirofumi Okita, Kentaro Motohara, Hidenori Takahashi, Masahiro Konishi, Natsuko M. Kato, Shuhei Koyama, Nuo Chen, Shogo Homan, Akino Yasuda

Proceedings Volume 12188, 121882V (2022) https://doi.org/10.1117/12.2627205

KEYWORDS: Mirrors, Image quality, Vignetting, Optical fabrication, Stray light, Fabrication, Tolerancing, Surface roughness

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Sunrise chromospheric Infrared spectroPolarimeter (SCIP) for SUNRISE III: thermal-vacuum test of the SCIP optical unit

Y. Katsukawa, H. Hara, M. Kubo, Y. Kawabata, T. Oba, J. Piqueras Carreño, I. Pérez Grande, K. Shinoda, T. Tamura, F. Uraguchi, T. Tsuzuki, Y. Nodomi, T. Shimizu, A. C. López Jiménez, M. Balaguer Jiménez, D. Álvarez García

Proceedings Volume 12184, 121842B (2022) https://doi.org/10.1117/12.2629972

KEYWORDS: Cameras, Optical benches, Imaging systems, Spectrographs, Mirrors, Infrared spectroscopy, Infrared radiation, Spectral resolution

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Optical alignment and performance evaluation of the Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) for SUNRISE III

Yusuke Kawabata, Yukio Katsukawa, Toshihiro Tsuzuki, Fumihiro Uraguchi, Kenji Mitsui, Kazuya Shinoda, Tomonori Tamura, Yoshifumi Nodomi, Hirohisa Hara, Masahito Kubo

Proceedings Volume 12184, 1218427 (2022) https://doi.org/10.1117/12.2627580

KEYWORDS: Modulation transfer functions, Optical alignment, Cameras, Mirrors, Optical components, Infrared spectroscopy, Infrared radiation, Monochromatic aberrations, Tunable lasers

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

SUNRISE Chromospheric Infrared spectroPolarimeter (SCIP) for SUNRISE III: Scan mirror mechanism

Takayoshi Oba, Toshifumi Shimizu, Yukio Katsukawa, Masahito Kubo, Fumihiro Uraguchi, Toshihiro Tsuzuki, Tomonori Tamura, Kazuya Shinoda, Kazuhide Kodeki, Kazuhiko Fukushima, Achim Gandorfer, Jose Carlos del Toro Iniesta

Proceedings Volume 11445, 114454F (2020) https://doi.org/10.1117/12.2562075

KEYWORDS: Mirrors, Infrared spectroscopy, Infrared radiation, Infrared imaging, Magnetism, Solar processes, Spatial resolution, Electromagnetism, Actuators, Capacitance

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) for SUNRISE III: opto-mechanical analysis and design

Fumihiro Uraguchi, Toshihiro Tsuzuki, Yukio Katsukawa, Hirohisa Hara, Satoru Iwamura, Masahito Kubo, Yoshifumi Nodomi, Yoshinori Suematsu, Yusuke Kawabata, Toshifumi Shimizu, Achim Gandorfer, Jose Carlos del Toro Iniesta

Proceedings Volume 11447, 11447AB (2020) https://doi.org/10.1117/12.2561812

KEYWORDS: Infrared spectroscopy, Infrared radiation, Wavefronts, Optical components, Infrared telescopes, Error analysis, Optical instrument design, Observatories, Telescopes, Motion analysis

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

A sensitivity analysis of the updated optical design for EUVST on the Solar-C mission

Tomoko Kawate, Toshihiro Tsuzuki, Toshifumi Shimizu, Shinsuke Imada, Yukio Katsukawa, Hirohisa Hara, Yoshinori Suematsu, Kiyoshi Ichimoto, Tomoya Hattori, Shota Narasaki, Harry Warren, Luca Teriaca, Clarence Korendyke, Charles Brown, Frederic Auchere

Proceedings Volume 11444, 114443J (2020) https://doi.org/10.1117/12.2560573

KEYWORDS: Optical design, Error analysis, Spatial resolution, Sensors, Point spread functions, Spectral resolution, Optical components, Extreme ultraviolet, Spectroscopy, Ultraviolet telescopes

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Sunrise Chromospheric Infrared SpectroPolarimeter (SCIP) for sunrise III: system design and capability

Y. Katsukawa, J. C. del Toro Iniesta, S. Solanki, M. Kubo, H. Hara, T. Shimizu, T. Oba, Y. Kawabata, T. Tsuzuki, F. Uraguchi, Y. Nodomi, K. Shinoda, T. Tamura, Y. Suematsu, R. Ishikawa, R. Kano, T. Matsumoto, K. Ichimoto, S. Nagata, C. Quintero Noda, T. Anan, D. Orozco Suárez, M. Balaguer Jiménez, A. López Jiménez, J. P. Cobos Carrascosa, A. Feller, T. Riethmueller, A. Gandorfer, A. Lagg

Proceedings Volume 11447, 114470Y (2020) https://doi.org/10.1117/12.2561223

KEYWORDS: Infrared spectroscopy, Infrared radiation, Signal detection, Observatories, Solar processes, Spectral resolution, Polarimetry, Polarization, Optical telescopes, Near ultraviolet

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) for SUNRISE III: optical design and performance

Toshihiro Tsuzuki, Yukio Katsukawa, Fumihiro Uraguchi, Hirohisa Hara, Masahito Kubo, Yoshifumi Nodomi, Yoshinori Suematsu, Yusuke Kawabata, Toshifumi Shimizu, Achim Gandorfer, Alex Feller, Bianca Grauf, Sami Solanki, Jose Carlos del Toro Iniesta

Proceedings Volume 11447, 11447AJ (2020) https://doi.org/10.1117/12.2562245

KEYWORDS: Infrared spectroscopy, Infrared radiation, Optical design, Diffraction gratings, Infrared telescopes, Spectral resolution, Diffraction, Wavefronts, Error analysis, Optical instrument design

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Optical design of the Chromospheric LAyer Spectro-Polarimeter (CLASP2)

Toshihiro Tsuzuki, Ryohko Ishikawa, Ryouhei Kano, Noriyuki Narukage, Donguk Song, Masaki Yoshida, Fumihiro Uraguchi, Takenori Okamoto, David McKenzie, Ken Kobayashi, Laurel Rachmeler, Frederic Auchere, Javier Trujillo Bueno

Proceedings Volume 11444, 114446W (2020) https://doi.org/10.1117/12.2562273

KEYWORDS: Optical design, Polarization, Magnetism, Rockets, Scattering, Zeeman effect, Off axis mirrors, Mirrors, Solar processes, Vacuum ultraviolet

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Performances of an integral field unit for FOCAS on the Subaru telescope

Shinobu Ozaki, Takashi Hattori, Kentaro Aoki, Chien-Hsiu Lee, Mitsuhiro Fukushima, Hikaru Iwashita, Kenji Mitsui, Yoko Tanaka, Toshihiro Tsuzuki, Norio Okada, Yoshiyuki Obuchi, Satoshi Miyazaki, Takuya Yamashita

Proceedings Volume 11447, 114475T (2020) https://doi.org/10.1117/12.2560602

KEYWORDS: Telescopes, Spectrographs, Galactic astronomy, Optical imaging, Cameras, Image quality, Absorption, Mirrors, Coating

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Fabrication of mirror arrays with an ultra-precision cutting technique for a near-infrared integral field unit SWIMS-IFU

Kosuke Kushibiki, Takuya Hosobata, Masahiro Takeda, Yutaka Yamagata, Shin-ya Morita, Kentaro Motohara, Shinobu Ozaki, Toshihiro Tsuzuki, Hidenori Takahashi, Yukihiro Kono, Masahiro Konishi, Natsuko Kato, Yasunori Terao, Hiroki Nakamura

Proceedings Volume 11451, 114512Y (2020) https://doi.org/10.1117/12.2560431

KEYWORDS: Mirrors, Fabrication, Infrared telescopes, Telescopes, Aluminum, Surface roughness, Infrared imaging, Infrared spectroscopy, Infrared radiation, Astronomical imaging

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

The Solar-C (EUVST) mission: the latest status

Toshifumi Shimizu, Shinsuke Imada, Tomoko Kawate, Yoshinori Suematsu, Hirohisa Hara, Toshihiro Tsuzuki, Yukio Katsukawa, Masahito Kubo, Ryoko Ishikawa, Tetsuya Watanabe, Shin Toriumi, Kiyoshi Ichimoto, Shin'ichi Nagata, Takahiro Hasegawa, Takaaki Yokoyama, Kyoko Watanabe, Katsuhiko Tsuno, Clarence Korendyke, Harry Warren, Bart De Pontieu, Paul Boerner, Sami Solanki, Luca Teriaca, Udo Schuehle, Sarah Matthews, David Long, William Thomas, Barry Hancock, Hamish Reid, Andrzej Fludra, Frederic Auchère, Vincenzo Andretta, Giampiero Naletto, Luca Poletto, Louise Harra

Proceedings Volume 11444, 114440N (2020) https://doi.org/10.1117/12.2560887

KEYWORDS: Extreme ultraviolet, Spectroscopy, Telescopes, Solar processes, Spectrographs, Imaging systems, Coronagraphy, Spatial resolution, Cameras, Mirrors

Read Abstract +

Proceedings Article | 9 September 2019 Paper

Paper

Concept study of Solar-C_EUVST optical design

Tomoko Kawate, Toshifumi Shimizu, Shinsuke Imada, Toshihiro Tsuzuki, Yukio Katsukawa, Hirohisa Hara, Yoshinori Suematsu, Kiyoshi Ichimoto, Harry Warren, Luca Teriaca, Clarence Korendyke, Charles Brown

Proceedings Volume 11118, 111181N (2019) https://doi.org/10.1117/12.2527957

KEYWORDS: Mirrors, Sensors, Solar processes, Optical design, Extreme ultraviolet, Tolerancing, Spectral resolution, Geometrical optics, Telescopes, Vacuum ultraviolet

Read Abstract +

SPIE Journal Paper | 6 June 2019

Design study of an image slicer module for a multiobject spectrograph

Shinobu Ozaki, Toshihiro Tsuzuki, Yoshiyuki Obuchi, Bungo Ikenoue, Satoshi Miyazaki, Jason Fucik, Kevin Bundy, Maureen Savage

JATIS, Vol. 5, Issue 03, 035001, (June 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.3.035001

KEYWORDS: Mirrors, Telescopes, Spectrographs, Astronomical imaging, Reflectivity, Tolerancing, Thirty Meter Telescope, Manufacturing, Optical design, Image quality

Read Abstract +

Proceedings Article | 11 July 2018 Paper

Paper

Image slicer module for Wide Field Optical Spectrograph (WFOS)

Shinobu Ozaki, Satoshi Miyazaki, Toshihiro Tsuzuki, Jason Fucik

Proceedings Volume 10702, 107028M (2018) https://doi.org/10.1117/12.2309324

KEYWORDS: Spectrographs, Thirty Meter Telescope, Astronomy, Optical design

Read Abstract +

Proceedings Article | 10 July 2018 Paper

Paper

Design of an integral field unit for SWIMS and its milling process fabrication with an ultra-high precision machine tool

Yukihiro Kono, Yutaka Yamagata, Shin-ya Morita, Kentaro Motohara, Shinobu Ozaki, Toshihiro Tsuzuki, Hidenori Takahashi, Yutaro Kitagawa, Masahiro Konishi, Natsuko Kato, Yasunori Terao, Hirofumi Ohashi, Kosuke Kushibiki

Proceedings Volume 10706, 107063F (2018) https://doi.org/10.1117/12.2312351

KEYWORDS: Mirrors, Tolerancing, Vignetting, Aluminum, Surface finishing, Infrared telescopes, Surface roughness, Off axis mirrors, Diamond

Read Abstract +

Proceedings Article | 9 July 2018 Presentation

Presentation

WFOS instrument trade study: slicer vs. fiber instrument concept designs and results (Conference Presentation)

Kevin Bundy, Maureen Savage, Renate Kupke, Nicholas MacDonald, Kyle Westfall, Matthew Radovan, Zheng Cai, Brian Digiorgio, Richard Dekany, Devika Divakar, Jason Fucik, Hangxin Ji, Satoshi Miyazaki, Shinobu Ozaki, Andrew Phillips, Namrata Roy, Roger Smith, Arun Surya, S. Sriram, Sivarani Thirupathi, Toshihiro Tsuzuki

Proceedings Volume 10702, 1070220 (2018) https://doi.org/10.1117/12.2312283

KEYWORDS: Spectrographs, Thirty Meter Telescope, Multiplexing, Robotic systems, Spectroscopy, Astronomical imaging, Robotics, Fiber couplers, Telescopes

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Optical alignment of the high-precision UV spectro-polarimeter (CLASP2)

Donguk Song, Ryohko Ishikawa, Ryouhei Kano, Masaki Yoshida, Toshihiro Tsuzuki, Fumihiro Uraguchi, Kazuya Shinoda, Hirohisa Hara, Takenori Okamoto, Frédéric Auchère, David McKenzie, Laurel Rachmeler, Javier Trujillo Bueno

Proceedings Volume 10699, 106992W (2018) https://doi.org/10.1117/12.2313056

KEYWORDS: Magnesium, Surface plasmons, Cameras, Mirrors, Lamps, Optical alignment, Off axis mirrors, Polarization, Image quality, Reflectivity, Absorption spectroscopy, Astronomical telescopes, UV optics, Rockets, Alignment procedures

Read Abstract +

Proceedings Article | 9 August 2016 Paper

Paper

Polishing test of a poly-crystal calcium fluoride lens: toward the development of TMT WFOS

Shinobu Ozaki, Satoshi Miyazaki, Toshihiro Tsuzuki, Yoko Tanaka

Proceedings Volume 9908, 99089N (2016) https://doi.org/10.1117/12.2232226

KEYWORDS: Thirty Meter Telescope, Polishing, Cameras, Calcium, Crystals, Image quality, Astronomy, Optical spheres, Photovoltaics, Zemax

Read Abstract +

Proceedings Article | 9 August 2016 Paper

Paper

The Infrared Imaging Spectrograph (IRIS) for TMT: the ADC optical design

Andrew Phillips, Ryuji Suzuki, James Larkin, Anna Moore, Yutaka Hayano, Toshihiro Tsuzuki, Shelley Wright

Proceedings Volume 9908, 9908A1 (2016) https://doi.org/10.1117/12.2232952

KEYWORDS: IRIS Consortium, Imaging systems, Atmospheric optics, Infrared Imaging Spectrograph, Optical design, Distortion, Glasses, Astronomy, Atmospheric optics, Prisms, Data modeling

Read Abstract +

Proceedings Article | 4 August 2016 Paper

Paper

The Infrared Imaging Spectrograph (IRIS) for TMT: optical design of IRIS imager with "co-axis double TMA"

Toshihiro Tsuzuki, Ryuji Suzuki, Hiroki Harakawa, Bungo Ikenoue, James Larkin, Anna Moore, Yoshiyuki Obuchi, Andrew Phillips, Sakae Saito, Fumihiro Uraguchi, James Wincentsen, Shelley Wright, Yutaka Hayano

Proceedings Volume 9908, 9908AE (2016) https://doi.org/10.1117/12.2232491

KEYWORDS: Optical design, IRIS Consortium, Imaging systems, Telescopes, Mirrors, Cameras, Collimators, Wavefront aberrations, Optical components, Sensors

Read Abstract +

SPIE Journal Paper | 24 February 2015

Design of wide-field Nasmyth optical system for a submillimeter camera

Toshihiro Tsuzuki, Tom Nitta, Hiroaki Imada, Masumichi Seta, Naomasa Nakai, Shigeyuki Sekiguchi, Yutaro Sekimoto

JATIS, Vol. 1, Issue 02, 025002, (February 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.2.025002

KEYWORDS: Mirrors, Telescopes, Cameras, Optical design, Galactic astronomy, Sensors, Optical instrument design, Imaging systems, Cryogenics, Astronomy

Read Abstract +

Proceedings Article | 28 July 2014 Paper

Paper

Development of a slicer integral field unit for the existing optical spectrograph FOCAS: progress

Shinobu Ozaki, Yoko Tanaka, Takashi Hattori, Kenji Mitsui, Mitsuhiro Fukushima, Norio Okada, Yoshiyuki Obuchi, Toshihiro Tsuzuki, Satoshi Miyazaki, Takuya Yamashita

Proceedings Volume 9151, 915149 (2014) https://doi.org/10.1117/12.2054838

KEYWORDS: Mirrors, Telescopes, Spectrographs, Zemax, Prototyping, Spherical lenses, Vignetting, Image quality, Sensors, Cameras

Read Abstract +

Proceedings Article | 23 July 2014 Paper

Paper

Design of wide-field Nasmyth optics for a submillimeter camera

Toshihiro Tsuzuki, Tom Nitta, Hiroaki Imada, Masumichi Seta, Naomasa Nakai, Sigeyuki Sekiguchi, Yutaro Sekimoto

Proceedings Volume 9153, 91532U (2014) https://doi.org/10.1117/12.2055694

KEYWORDS: Telescopes, Cameras, Mirrors, Cryogenics, Sensors, Optical design, Diffraction, Galactic astronomy, Space telescopes, Optical instrument design

Read Abstract +

Proceedings Article | 23 July 2014 Paper

Paper

Developments of wide field submillimeter optics and lens antenna-coupled MKID cameras

Y. Sekimoto, T. Nitta, K. Karatsu, M. Sekine, S. Sekiguchi, T. Okada, S. Shu, T. Noguchi, M. Naruse, K. Mitsui, N. Okada, T. Tsuzuki, A. Dominjon, H. Matsuo

Proceedings Volume 9153, 91532P (2014) https://doi.org/10.1117/12.2055666

KEYWORDS: Cameras, Silicon, Sensors, Resonators, Microwave radiation, Antennas, Epoxies, Optical cryogenics, Dielectrics, Aluminum

Read Abstract +

Showing 5 of 27 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement