Dr. Yoko Takeo Profile

Dr. Yoko Takeo

at Univ of Tokyo

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 4 October 2024 Presentation

Development of a combined soft x-ray and visible light microscope for observation of biological cells

Satoru Egawa, Kai Sakurai, Yoko Takeo, Kyota Yoshinaga, Shigeki Owada, Gota Yamaguchi, Shunya Yokomae, Hidekazu Mimura, Yutaka Yamagata, Makina Yabashi, Takashi Kimura, Mari Shimura

Proceedings Volume PC13150, PC1315001 (2024) https://doi.org/10.1117/12.3028505

KEYWORDS: X-rays, Microscopes, Visible radiation, X-ray imaging, X-ray microscopy, Color imaging, Windows, Visualization, Objectives, Mirrors

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Proceedings Article | 6 October 2023 Presentation

Combining wave-optical and ray-tracing calculations in x-ray reflective optical systems

Hidekazu Mimura, Yoko Takeo, Hiroto Motoyama, Satoru Egawa, Takashi Kimura, Yasunori Senba, Takashi Tanaka, Haruhiko Ohashi

Proceedings Volume PC12697, PC1269702 (2023) https://doi.org/10.1117/12.2678528

KEYWORDS: X-rays, X-ray optics, X-ray lasers, Synchrotron radiation, Phase distribution, Partial coherence, Mirrors, Free electron lasers

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Proceedings Article | 3 October 2023 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 | 4 October 2022 Presentation + Paper

Surface evaluation of high-precision monolithic mirror for soft x-ray focusing

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

Proceedings Volume 12240, 122400G (2022) https://doi.org/10.1117/12.2633765

KEYWORDS: Mirrors, X-rays, Profilometers, Stitching interferometry

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Proceedings Article | 4 October 2022 Presentation + Paper

Design of soft x-ray fluorescence microscopy beyond 100-nm spatial resolution with ultrashort Kirkpatrick-Baez mirror

Takenori Shimamura, Yoko Takeo, Fumika Moriya, Takashi Kimura, Mari Shimura, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Kenta Shimba, Yasuhiko Jimbo, Hidekazu Mimura

Proceedings Volume 12240, 1224004 (2022) https://doi.org/10.1117/12.2632949

KEYWORDS: Silicon, X-rays, Luminescence, Mirrors, X-ray fluorescence spectroscopy, Sensors, Aluminum, Fluorine, Fluorescence spectroscopy

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Proceedings Article | 21 September 2021 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

Development of figure correction system for axisymmetric x-ray mirrors

Shunya Yokomae, Yoko Takeo, Takenori Shimamura, Yusuke Matsuzawa, Takehiro Kume, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Hidekazu Mimura

Proceedings Volume 11837, 1183709 (2021) https://doi.org/10.1117/12.2594523

KEYWORDS: Mirrors, X-rays, Surface finishing, Abrasives, Nickel, Wavefronts, X-ray diffraction, Synchrotron radiation, Surface micromachining, Phase retrieval, X-ray optics

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Proceedings Article | 21 September 2021 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 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 | 13 December 2020 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 | 8 September 2020 Presentation + Paper

Development of precise electroformed Wolter mirror for X-ray astronomy

Gota Yamaguchi, Takehiro Kume, Yoko Takeo, Yusuke Matsuzawa, Kentaro Hiraguri, Yoichi Imamura, Hiroaki Miyashita, Keisuke Tamura, Yusuke Takehara, Ayumu Takigawa, Tetsuo Kanoh, Kenji Tachibana, Ikuyuki Mitsuishi, Hirokazu Hashizume, Hidekazu Mimura

Proceedings Volume 11491, 114910K (2020) https://doi.org/10.1117/12.2569834

KEYWORDS: Mirrors, X-ray astronomy, Synchrotrons, Fabrication, Space mirrors, Objectives, Spatial resolution, X-rays, Quartz, Glasses

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Proceedings Article | 4 September 2020 Presentation + Paper

High precision free-form optics and application to soft x-ray mirrors

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

Proceedings Volume 11491, 114910G (2020) https://doi.org/10.1117/12.2568909

KEYWORDS: Mirrors, X-rays, Freeform optics, Optics manufacturing, Precision optics, X-ray optics, Light sources, Solids

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Proceedings Article | 21 August 2020 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 | 21 August 2020 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 + Paper

Design of ultrashort Kirkpatrick-Baez mirror for soft x-ray nanofocusing

Takenori Shimamura, Yoko Takeo, Takashi Kimura, Hirokazu Hashizume, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Hidekazu Mimura

Proceedings Volume 11492, 114920P (2020) https://doi.org/10.1117/12.2569845

KEYWORDS: Mirrors, X-rays, Reflectivity, X-ray optics, X-ray diffraction, X-ray microscopy, Diffraction, X-ray imaging, Light sources

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Proceedings Article | 9 September 2019 Paper

Development of 120-mm-long ellipsoidal mirror for soft x-ray microscopy

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

Proceedings Volume 11108, 1110806 (2019) https://doi.org/10.1117/12.2528296

KEYWORDS: Mirrors, X-rays, X-ray microscopy, X-ray optics

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Proceedings Article | 9 September 2019 Paper

Three-dimensional shape measurement of an ellipsoidal mirror by industrial x-ray computed tomography

Satsuki Shimizu, Yoko Takeo, Gota Yamaguchi, Yutaka Ohtake, Yukie Nagai, Hidekazu Mimura

Proceedings Volume 11109, 111090I (2019) https://doi.org/10.1117/12.2530321

KEYWORDS: Mirrors, X-ray computed tomography, X-rays, Reflectivity

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Proceedings Article | 18 September 2018 Paper

Ptychography simulations for precisely measuring wavefront profiles in soft x-ray focusing system based on ellipsoidal mirror

Yoko Takeo, Hiroto Motoyama, Yasunori Senba, Hikaru Kishimoto, Haruhiko Ohashi, Hidekazu Mimura

Proceedings Volume 10761, 107610F (2018) https://doi.org/10.1117/12.2320961

KEYWORDS: Mirrors, X-rays, Wavefronts, X-ray imaging, Optical simulations

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Proceedings Article | 25 October 2016 Paper

Evaluation of figure accuracy of Wolter mirror fabricated by electroforming

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

Proceedings Volume 9687, 968705 (2016) https://doi.org/10.1117/12.2243422

KEYWORDS: Mirrors, X-ray microscopy, Magnetorheological finishing, Phase retrieval, Wavefronts, Microscopes, Nickel, Spatial frequencies, X-rays, Objectives

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Proceedings Article | 20 September 2016 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

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

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

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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Showing 5 of 23 publications

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