Dr. Takahiro Saito Profile

Dr. Takahiro Saito

at Natsume Optical Corp

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 21 August 2024 Presentation + Paper

Presentation + Paper

Development of x-ray optics for the solar flare sounding rocket FOXSI-4: ground calibration

Kazuki Ampuku, Koki Sakuta, Ryuto Fujii, Yusuke Yoshida, Kumiko Okada, Keitoku Yoshihira, Tetsuo Kano, Naoki Ishida, Wataru Kato, Yoshitaka Inoue, Keisuke Tamura, Kikuko Miyata, Noriyuki Narukage, Gota Yamaguchi, Shunsuke Ito, Shutaro Mohri, Takehiro Kume, Yusuke Matsuzawa, Yoichi Imamura, Takahiro Saito, Kentaro Hiraguri, Hirokazu Hashizume, Hidekazu Mimura, Ikuyuki Mitsuishi

Proceedings Volume 13093, 1309323 (2024) https://doi.org/10.1117/12.3018109

KEYWORDS: X-ray optics, X-rays, Rockets, Calibration, Solar processes, Mirrors, Solar radiation models, Point spread functions, Hard x-rays, X-ray imaging

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Proceedings Article | 21 August 2024 Poster + Paper

Poster + Paper

Development of x-ray optics for the solar flare sounding rocket FOXSI-4: vibration test

Ryuto Fujii, Koki Sakuta, Kazuki Ampuku, Yusuke Yoshida, Takashi Ito, Kumiko Okada, Keitoku Yoshihira, Tetsuo Kano, Naoki Ishida, Yoshitaka Inoue, Keisuke Tamura, Kikuko Miyata, Noriyuki Narukage, Gota Yamaguchi, Shunsuke Ito, Shutaro Mohri, Takehiro Kume, Yusuke Matsuzawa, Yoichi Imamura, Takahiro Saito, Kentaro Hiraguri, Hirokazu Hashizume, Hidekazu Mimura, Ikuyuki Mitsuishi

Proceedings Volume 13093, 130936Y (2024) https://doi.org/10.1117/12.3018685

KEYWORDS: Vibration, X-ray optics, Mirrors, X-rays, Rockets, Sensors, X-ray imaging, Fermium, Stray light, Tolerancing

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Proceedings Article | 21 August 2024 Poster + Paper

Poster + Paper

Development of x-ray optics for the solar flare sounding rocket FOXSI-4: ray-tracing simulation

Yusuke Yoshida, Koki Sakuta, Kazuki Ampuku, Ryuto Fujii, Kumiko Okada, Keitoku Yoshihira, Tetsuo Kano, Naoki Ishida, Wataru Kato, Yoshitaka Inoue, Keisuke Tamura, Kikuko Miyata, Noriyuki Narukage, Gota Yamaguchi, Shunsuke Ito, Shutaro Mohri, Takehiro Kume, Yusuke Matsuzawa, Yoichi Imamura, Takahiro Saito, Kentaro Hiraguri, Hirokazu Hashizume, Hidekazu Mimura, Ikuyuki Mitsuishi

Proceedings Volume 13093, 130936W (2024) https://doi.org/10.1117/12.3018175

KEYWORDS: X-ray optics, X-rays, Solar processes, Point spread functions, Reflection, Mirrors, X-ray imaging, Parabolic mirrors, Mirror surfaces, Stray light

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Proceedings Article | 3 October 2023 Presentation + Paper

Presentation + Paper

Fabrication and surface evaluation of a high-precision monolithic mirror with complex geometry for soft x-ray focusing

T. Kume, Y. Matsuzawa, T. Saito, K. Hiraguri, Y. Takeo, T. Kimura, H. Kishimoto, Y. Senba, H. Ohashi, H. Mimura, H. Hashizume

Proceedings Volume 12694, 1269408 (2023) https://doi.org/10.1117/12.2677302

KEYWORDS: Mirrors, X-rays, Fabrication

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Proceedings Article | 21 September 2021 Presentation + Paper

Presentation + Paper

Electrodeposition simulation for fabricating Wolter mirrors of x-ray telescopes

Akinari Ito, Gota Yamaguchi, Takafumi Watanabe, Yoko Takeo, Takehiro Kume, Yusuke Matsuzawa, Takahiro Saito, Kentaro Hiraguri, Keisuke Tamura, Ayumu Takigawa, Tetsuo Kanoh, Naoki Ishida, Ikuyuki Mitsuishi, Hirokazu Hashizume, Hidekazu Mimura

Proceedings Volume 11837, 118370D (2021) https://doi.org/10.1117/12.2595124

KEYWORDS: Mirrors, X-ray telescopes, Electrodes, Nickel, X-rays, X-ray optics, Plating, X-ray astronomy, X-ray imaging, Stars

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Proceedings Article | 21 September 2021 Presentation + Paper

Presentation + Paper

Current status of development of electroforming process for high-precision soft x-ray mirrors

T. Kume, G. Yamaguchi, K. Hiraguri, Y. Matsuzawa, Y. Imamura, H. Miyashita, T. Saito, Y. Takeo, Y. Senba, H. Kishimoto, H. Ohashi, H. Hashizume, H. Mimura

Proceedings Volume 11837, 1183707 (2021) https://doi.org/10.1117/12.2594044

KEYWORDS: X-rays, Mirrors, X-ray optics, Synchrotrons, Reflectivity, Light sources

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Proceedings Article | 13 December 2020 Paper

Paper

Advanced fabrication technologies for ultraprecise replicated mirrors for x-ray telescopes

Hidekazu Mimura, Gota Yamaguchi, Takehiro Kume, Yoko Takeo, Akinari Ito, Yusuke Matsuzawa, Takahiro Saito, Kentarou Hiraguri, Yusuke Takehara, Ayumu Takigawa, Keisuke Tamura, Tetsuo Kanoh, Kenji Tachibana, Hirokazu Hashizume, Ikuyuki Mitsuishi

Proceedings Volume 11444, 114441G (2020) https://doi.org/10.1117/12.2560892

KEYWORDS: Mirrors, X-ray telescopes, Nickel, X-rays, Synchrotron radiation, Profilometers, Laser beam diagnostics, Spatial resolution, Magnetorheological finishing, Fabrication

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Proceedings Article | 13 December 2020 Poster

Poster

Space electroformed x-ray optics development

Ayumu Takigawa, Yusuke Takehara, Tetsuo Kanoh, Ryusei Yamaguchi, Naoki Ishida, Keisuke Tamura, Gota Yamaguchi, Akinari Ito, Yoko Takeo, Takehiro Kume, Yusuke Matsuzawa, Takahiro Saito, Kentarou Hiraguri, Hirokazu Hashizume, Hidekazu Mimura, Ikuyuki Mitsuishi

Proceedings Volume 11444, 114447B (2020) https://doi.org/10.1117/12.2557352

KEYWORDS: X-ray optics, Astronomical imaging, Spatial resolution, Aluminum, Plating, Mirrors

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Proceedings Article | 21 August 2020 Presentation + Paper

Presentation + Paper

Design of two-stage soft-X-ray nano-focusing system with a ring-focusing mirror and quasi-Wolter mirror

Yoko Takeo, Hiroto Motoyama, Takenori Shimamura, Takashi Kimura, Takehiro Kume, Yusuke Matsuzawa, Takahiro Saito, Yoichi Imamura, Hiroaki Miyashita, Kentarou Hiraguri, Hirokazu Hashizume, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Hidekazu Mimura

Proceedings Volume 11492, 114920N (2020) https://doi.org/10.1117/12.2570007

KEYWORDS: Mirrors, X-rays, Tolerancing, Monochromatic aberrations, Error analysis, X-ray technology, X-ray optics, Wavefront analysis, Optical design, Wavefront metrology

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Proceedings Article | 21 August 2020 Presentation

Presentation

Development of shape measurement system for high precision Wolter mandrel

Takehiro Kume, Hirokazu Hashizume, Kentarou Hiraguri, Yusuke Matsuzawa, Yoichi Imamura, Hiroaki Miyashita, Takahiro Saito, Gota Yamaguchi, Yoko Takeo, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Hidekazu Mimura

Proceedings Volume 11492, 114920M (2020) https://doi.org/10.1117/12.2568929

KEYWORDS: Mirrors, X-ray optics, X-ray imaging, Spatial resolution, Precision measurement, Profilometers

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Proceedings Article | 20 September 2016 Presentation + Paper

Presentation + Paper

Wavefront measurement of vortex beam using ptychographic phase retrieval

Takahiro Saito, Yoko Takeo, Hidekazu Mimura

Proceedings Volume 9982, 998202 (2016) https://doi.org/10.1117/12.2235725

KEYWORDS: Wavefronts, Phase retrieval, Diffraction, Optical testing, Helium neon lasers, Spiral phase plates, CCD cameras, Spatial light modulators, Holograms, Charge-coupled devices

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Proceedings Article | 12 October 2015 Paper

Paper

Ptychographic phase retrieval method for characterizing ultra-precise ellipsoidal mirrors

Yoko Takeo, Takahiro Saito, Hidekazu Mimura

Proceedings Volume 9633, 96332C (2015) https://doi.org/10.1117/12.2195864

KEYWORDS: Mirrors, Wavefronts, Phase retrieval, Charge-coupled devices, Transmittance, CCD cameras, X-rays, Monochromatic aberrations, Laser development, X-ray characterization

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Proceedings Article | 26 August 2015 Paper

Paper

Development of ellipsoidal focusing mirror for soft x-ray and extreme ultraviolet light

Hidekazu Mimura, Yoshinori Takei, Takahiro Saito, Takehiro Kume, Hiroto Motoyama, Satoru Egawa, Yoko Takeo, Takahiro Higashi

Proceedings Volume 9588, 95880L (2015) https://doi.org/10.1117/12.2187455

KEYWORDS: Mirrors, X-rays, Extreme ultraviolet, Geometrical optics, Wavefronts, X-ray optics, Chromatic aberrations, Spatial resolution, High harmonic generation, Free electron lasers

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Proceedings Article | 26 August 2015 Paper

Paper

Evaluation of surface figure error profile of ellipsoidal mirror for soft x-ray focusing

Yoko Takeo, Takahiro Saito, Hidekazu Mimura

Proceedings Volume 9588, 95880A (2015) https://doi.org/10.1117/12.2188824

KEYWORDS: Mirrors, X-rays, Phase retrieval, Wavefronts, CCD cameras, X-ray optics, Metrology, Charge-coupled devices, Visible radiation, Wavefront sensors

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Proceedings Article | 27 September 2013 Paper

Paper

Optical design of soft x-ray focusing system with ellipsoidal mirror for laboratory-based sources

Hiroto Motoyama, Takahiro Saito, Hidekazu Mimura

Proceedings Volume 8848, 88480E (2013) https://doi.org/10.1117/12.2023598

KEYWORDS: Mirrors, X-rays, Optical design, Light sources, Optical simulations, Diffraction, Spherical lenses, X-ray optics, High harmonic generation, X-ray diffraction

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Proceedings Article | 19 October 2012 Paper

Paper

Development of surface profile measurement method for ellipsoidal x-ray mirrors using phase retrieval

Takahiro Saitou, Yoshinori Takei, Hidekazu Mimura

Proceedings Volume 8501, 850103 (2012) https://doi.org/10.1117/12.930340

KEYWORDS: Mirrors, X-rays, Phase retrieval, Charge-coupled devices, Wavefronts, Linear filtering, Spherical lenses, Metrology, X-ray optics, Reflection

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Showing 5 of 16 publications

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