Prof. Naoshi Baba Profile

Prof. Naoshi Baba

Professor Emeritus

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 13 December 2020 Poster + Paper

Speckle reduction technique using the self-coherent camera for the common-path visible nulling coronagraph

Kenta Yoneta, Naoshi Murakami, Koki Yoshida, Ryuta Koike, Takayuki Kotani, Hajime Kawahara, Naoshi Baba, Motohide Tamura

Proceedings Volume 11451, 114513Y (2020) https://doi.org/10.1117/12.2560471

KEYWORDS: Speckle, Cameras, Coronagraphy, Spatial light modulators, Nulling interferometry, Exoplanets, Polarizers, Interferometry, Beam splitters, Calcite

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Proceedings Article | 11 July 2018 Paper

Experiments of GLAO using the domeless solar telescope of the Hida Observatory

Noriaki Miura, Takahiro Suzuki, Shinya Takahashi, Susumu Kuwamura, Naoshi Baba, Shin Oya, Satoru Ueno, Yoshikazu Nakatani, Kiyoshi Ichimoto

Proceedings Volume 10703, 1070336 (2018) https://doi.org/10.1117/12.2311985

KEYWORDS: Adaptive optics, Wavefront sensors, Sensors, Wavefronts, Observatories, Deformable mirrors, Solar telescopes, Computer simulations, Mirrors, Microlens array

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Proceedings Article | 8 August 2016 Paper

Image restoration for a hypertelescope

Yuto Nakai, Naoshi Baba, Naoshi Murakami, Noriaki Miura, Motohide Tamura

Proceedings Volume 9907, 99073F (2016) https://doi.org/10.1117/12.2231920

KEYWORDS: Image restoration, Telescopes, Image quality, Exoplanets, Point spread functions, Interferometry, Computer simulations, Sensors, Astronomy, Coronagraphy

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Proceedings Article | 27 July 2016 Paper

Status of Hida solar adaptive optics system and experiment of tomographic wavefront sensing

Noriaki Miura, Akira Oh-ishi, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Satoru Ueno, Yoshikazu Nakatani, Kiyoshi Ichimoto

Proceedings Volume 9909, 99092N (2016) https://doi.org/10.1117/12.2232141

KEYWORDS: Adaptive optics, Wavefront sensors, Tomography, Wavefronts, Sensors, Deformable mirrors, Computer simulations, Observatories, Data acquisition, Zernike polynomials

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Proceedings Article | 22 July 2016 Paper

A three-layer eight-octant phase mask towards broadband high-contrast observations

Naoshi Murakami, Jun Nishikawa, Natsumi Akaiwa, Yusuke Komuro, Naoshi Baba, Motohide Tamura

Proceedings Volume 9912, 99126G (2016) https://doi.org/10.1117/12.2231946

KEYWORDS: Exoplanets, Photonic crystals, Polarization, Coronagraphy, Light sources, Stars, Jones calculus, Space telescopes, Telescopes, Optical filters

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Proceedings Article | 22 July 2016 Paper

Development of speckle nulling technique for the Savart-plate lateral-shearing interferometric nuller for exoplanets (SPLINE)

Kenta Yoneta, Naoshi Murakami, Takayuki Kotani, Hajime Kawahara, Taro Matsuo, Naoshi Baba, Motohide Tamura

Proceedings Volume 9912, 99126I (2016) https://doi.org/10.1117/12.2231950

KEYWORDS: Speckle, Exoplanets, Nulling interferometry, Polarizers, Beam splitters, Wavefronts, Interferometry, Coronagraphy, Computer simulations, Modulation

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Proceedings Article | 11 September 2015 Paper

Numerically designed phase-mask for stellar coronagraph

Naoshi Baba, Naoshi Murakami, Noriaki Miura, Motohide Tamura

Proceedings Volume 9605, 96051V (2015) https://doi.org/10.1117/12.2186498

KEYWORDS: Point spread functions, Coronagraphy, Exoplanets, Mirrors, Stars, Optical filtering, Telescopes, Phase retrieval, Astronomy, Liquid crystals

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Proceedings Article | 28 August 2014 Paper

Recent progress on phase-mask coronagraphy based on photonic-crystal technology

Naoshi Murakami, Jun Nishikawa, Motohide Tamura, Eugene Serabyn, Wesley Traub, Kurt Liewer, Dwight Moody, John Trauger, Olivier Guyon, Frantz Martinache, Nemanja Jovanovic, Garima Singh, Fumika Oshiyama, Hayato Shoji, Moritsugu Sakamoto, Shoki Hamaguchi, Kazuhiko Oka, Naoshi Baba

Proceedings Volume 9143, 914334 (2014) https://doi.org/10.1117/12.2054790

KEYWORDS: Coronagraphy, Manufacturing, Photomasks, Spiral phase plates, Space telescopes, Telescopes, Light sources, Polarizers, Adaptive optics, Polarization

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Proceedings Article | 21 July 2014 Paper

Development of a new solar adaptive optics system at the Hida Observatory

Noriaki Miura, Ayumu Oh-ishi, Shotaro Aoki, Hikaru Mogaki, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Masashi Yamaguchi, Satoru Ueno, Yoshikazu Nakatani, Kiyoshi Ichimoto

Proceedings Volume 9148, 914831 (2014) https://doi.org/10.1117/12.2055786

KEYWORDS: Adaptive optics, Mirrors, Spectrographs, Observatories, Wavefront sensors, Off axis mirrors, Wavefronts, Telescopes, Solar telescopes, Deformable mirrors

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Proceedings Article | 18 July 2014 Paper

Laboratory demonstration of the Savart-plate lateral-shearing interferometric nuller for exoplanets (SPLINE)

Hirofumi Kitou, Naoshi Murakami, Manabu Kida, Naoshi Baba, Taro Matsuo, Takayuki Kotani, Hajime Kawahara, Motohide Tamura

Proceedings Volume 9151, 91515N (2014) https://doi.org/10.1117/12.2055287

KEYWORDS: Wavefronts, Exoplanets, Polarizers, Interferometry, Surface plasmons, Liquid crystals, Light sources, Polarization, Nulling interferometry, Optical components

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Proceedings Article | 17 October 2012 Paper

Unbalanced nulling interferometer with four-quadrant phase mask

Takuji Kobayashi, Jun Nishikawa, Yosuke Tanaka, Takashi Kurokawa, Ken Kashiwagi, Naoshi Murakami, Naoshi Baba, Nobuyuki Hashimoto

Proceedings Volume 8421, 84213D (2012) https://doi.org/10.1117/12.975179

KEYWORDS: Wavefronts, Adaptive optics, Interferometers, Exoplanets, Nulling interferometry, Picture Archiving and Communication System, Coronagraphy, Stars, Planets, Phase interferometry

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Proceedings Article | 24 September 2012 Paper

Development of the Savart-plate lateral-shearing interferometric nuller for exoplanet (SPLINE)

Naoshi Murakami, Manabu Kida, Naoshi Baba, Taro Matsuo, Takayuki Kotani, Hajime Kawahara, Yuka Fujii, Motohide Tamura

Proceedings Volume 8446, 84468H (2012) https://doi.org/10.1117/12.925605

KEYWORDS: Nulling interferometry, Stars, Polarizers, Interferometers, Telescopes, Light sources, Polarization, Exoplanets, Interferometry, Thirty Meter Telescope

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Proceedings Article | 24 September 2012 Paper

Second-Earth imager for TMT (SEIT): concept and its numerical simulation

Taro Matsuo, Takayuki Kotani, Naoshi Murakami, Hajime Kawahara, Yuka Fujii, Shin Oya, Mikio Kurita, Noriaki Natsume, Norio Narita, Kenji Takizawa, Masahiro Ikoma, Jun Minagawa, Naoshi Baba, Motohide Tamura

Proceedings Volume 8446, 84461K (2012) https://doi.org/10.1117/12.926039

KEYWORDS: Planets, Interferometers, Stars, Oxygen, Absorption, Coronagraphy, Speckle, Adaptive optics, Imaging systems, Thirty Meter Telescope

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Proceedings Article | 21 September 2012 Paper

Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy

Naoshi Murakami, Jun Nishikawa, Wesley Traub, Dimitri Mawet, Dwight Moody, Brian Kern, John Trauger, Eugene Serabyn, Shoki Hamaguchi, Fumika Oshiyama, Moritsugu Sakamoto, Akitoshi Ise, Kazuhiko Oka, Naoshi Baba, Hiroshi Murakami, Motohide Tamura

Proceedings Volume 8442, 844205 (2012) https://doi.org/10.1117/12.925613

KEYWORDS: Coronagraphy, Polarization, Photonic crystals, Manufacturing, Photomasks, Stars, Polarimetry, Spiral phase plates, Phase shift keying, Planets

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Proceedings Article | 21 September 2012 Paper

SPICA coronagraph instrument: characterization of atmospheres and physical parameters of giant planets by direct imaging and spectroscopy

T. Kotani, K. Enya, T. Nakagawa, H. Matsuhara, H. Kataza, M. Kawada, M. Mita, K. Komatsu, H. Uchida, K. Fujiwara, S. Mitani, S. Sakai, K. Haze, H. Kaneda, S. Oyabu, D. Ishihara, T. Miyata, S. Sako, T. Nakamura, K. Asano, M. Tamura, J. Nishikawa, T. Yamashita, N. Narita, H. Hayano, S. Oya, E. Kokubo, Y. Itoh, T. Matsuo, M. Fukagawa, H. Shibai, M. Honda, N. Baba, N. Murakami, Y. Okamoto, S. Ida, M. Takami, L. Abe, O. Guyon, T. Yamamuro

Proceedings Volume 8442, 84420F (2012) https://doi.org/10.1117/12.925832

KEYWORDS: Coronagraphy, Imaging spectroscopy, Planets, Stars, Exoplanets, Point spread functions, Spectroscopy, Spectroscopes, Telescopes, Binary data

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Proceedings Article | 13 September 2012 Paper

Solar adaptive optics at the Hida Observatory: latest achievements of current system and design of new system

Noriaki Miura, Jun'ichi Miyazaki, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Masashi Yamaguchi, Satoru Ueno, Yoshikazu Nakatani, Shin'ichi Nagata, Reizaburou Kitai, Kiyoshi Ichimoto, Hideki Takami

Proceedings Volume 8447, 84474D (2012) https://doi.org/10.1117/12.925848

KEYWORDS: Adaptive optics, Mirrors, Spectrographs, Observatories, Wavefront sensors, Deformable mirrors, Off axis mirrors, Wavefronts, Solar telescopes, Imaging systems

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Proceedings Article | 15 September 2011 Paper

Taking the vector vortex coronagraph to the next level for ground- and space-based exoplanet imaging instruments: review of technology developments in the USA, Japan, and Europe

Dimitri Mawet, Naoshi Murakami, Christian Delacroix, Eugene Serabyn, Olivier Absil, Naoshi Baba, Jacques Baudrand, Anthony Boccaletti, Rick Burruss, Russell Chipman, Pontus Forsberg, Serge Habraken, Shoki Hamaguchi, Charles Hanot, Akitoshi Ise, Mikael Karlsson, Brian Kern, John Krist, Andreas Kuhnert, Marie Levine, Kurt Liewer, Stephen McClain, Scott McEldowney, Bertrand Mennesson, Dwight Moody, Hiroshi Murakami, Albert Niessner, Jun Nishikawa, Nada O'Brien, Kazuhiko Oka, Peggy Park, Pierre Piron, Laurent Pueyo, Pierre Riaud, Moritsugu Sakamoto, Motohide Tamura, John Trauger, David Shemo, Jean Surdej, Nelson Tabirian, Wesley Traub, James Wallace, Kaito Yokochi

Proceedings Volume 8151, 815108 (2011) https://doi.org/10.1117/12.896059

KEYWORDS: Coronagraphy, Polarization, Spiral phase plates, Photonic crystals, Liquid crystals, Polymers, Telescopes, Exoplanets, Space telescopes, Optics manufacturing

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Proceedings Article | 11 August 2010 Paper

Polarization-interferometric eight-octant phase-mask coronagraph using ferroelectric liquid crystal for exoplanet detection

Naoshi Murakami, Takeshi Inabe, Toshihiko Komatsu, Jun Nishikawa, Nobuyuki Hashimoto, Makoto Kurihara, Naoshi Baba, Motohide Tamura

Proceedings Volume 7731, 77314E (2010) https://doi.org/10.1117/12.856395

KEYWORDS: Coronagraphy, Manufacturing, Polarizers, Stars, Ferroelectric LCDs, Polarization, Optics manufacturing, Exoplanets, Photomasks, Exoplanetary science

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Proceedings Article | 29 July 2010 Paper

Optical setup and wavefront sensor for solar adaptive optics at the Domeless Solar Telescope, Hida Observatory

Noriaki Miura, Fumihito Yokoyama, Maoto Nefu, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Satoru Ueno, Yoshikazu Nakatani, Shin'ichi Nagata, Reizaburou Kitai, Kiyoshi Ichimoto, Hideki Takami

Proceedings Volume 7736, 773654 (2010) https://doi.org/10.1117/12.856791

KEYWORDS: Adaptive optics, Wavefront sensors, Mirrors, Observatories, Deformable mirrors, Wavefronts, Spectrographs, Solar telescopes, Telescopes, Computing systems

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Proceedings Article | 16 July 2010 Paper

An eight-octant phase-mask coronagraph for the Subaru coronagraphic extreme AO (SCExAO) system: system design and expected performance

Naoshi Murakami, Olivier Guyon, Frantz Martinache, Taro Matsuo, Kaito Yokochi, Jun Nishikawa, Motohide Tamura, Takashi Kurokawa, Naoshi Baba, Frédéric Vogt, Vincent Garrel, Takashi Yoshikawa

Proceedings Volume 7735, 773533 (2010) https://doi.org/10.1117/12.858116

KEYWORDS: Coronagraphy, Telescopes, Polarizers, Space telescopes, Adaptive optics, Imaging systems, Apodization, Sensors, Wavefronts, Stars

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Proceedings Article | 18 September 2009 Paper

Image reconstruction of Io from the bispectrum using building block method

Yuuki Yoshinoya, Susumu Kuwamura, Noriaki Miura, Fumiaki Tsumuraya, Makoto Sakamoto, Naoshi Baba

Proceedings Volume 7439, 74390W (2009) https://doi.org/10.1117/12.825448

KEYWORDS: Information operations, Speckle, Image restoration, Astronomy, Satellites, Data modeling, Telescopes, Deconvolution, Observatories, Astronomical telescopes

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Proceedings Article | 18 September 2009 Paper

Advances in solar adaptive optics system at the domeless solar telescope of the Hida Observatory

Noriaki Miura, Yuuki Noto, Shuusuke Kato, Fumihito Yokoyama, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Shin'ichi Nagata, Satoru Ueno, Reizaburo Kitai, Kiyoshi Ichimoto, Hideki Takami

Proceedings Volume 7439, 74390U (2009) https://doi.org/10.1117/12.825218

KEYWORDS: Adaptive optics, Mirrors, Observatories, Deformable mirrors, Spectrographs, Wavefront sensors, Solar telescopes, Control systems, Electromagnetism, Actuators

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Proceedings Article | 15 July 2008 Paper

Solar adaptive optics system at the Hida Observatory

Noriaki Miura, Yuuki Noto, Shuusuke Kato, Susumu Kuwamura, Naoshi Baba, Yoichiro Hanaoka, Shin'ichi Nagata, Satoru Ueno, Reizaburo Kitai, Hideki Takami

Proceedings Volume 7015, 70156U (2008) https://doi.org/10.1117/12.788308

KEYWORDS: Adaptive optics, Deformable mirrors, Mirrors, Wavefront sensors, Observatories, Turbulence, Cameras, Actuators, Microlens array, Zernike polynomials

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Proceedings Article | 12 July 2008 Paper

Polarization analysis as a means of detecting exoplanets and measuring their objective spectra

N. Zubko, N. Baba, N. Murakami

Proceedings Volume 7010, 70101P (2008) https://doi.org/10.1117/12.788538

KEYWORDS: Polarization, Planets, Exoplanets, Coronagraphy, Stars, Polarization analysis, Prisms, Destructive interference, Nulling interferometry, Imaging spectroscopy

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Proceedings Article | 12 July 2008 Paper

Laboratory experiments on the 8-octant phase-mask coronagraph

Naoshi Murakami, Ryosuke Uemura, Naoshi Baba, Hiroshi Shibuya, Jun Nishikawa, Lyu Abe, Motohide Tamura, Nobuyuki Hashimoto

Proceedings Volume 7010, 70101J (2008) https://doi.org/10.1117/12.788145

KEYWORDS: Coronagraphy, Liquid crystals, Stars, Manufacturing, Numerical simulations, Polarization, Exoplanets, Helium neon lasers, Modulation, Astronomy

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Proceedings Article | 15 June 2006 Paper

Polarization and spectral differential imager using channeled spectrum

Naoshi Murakami, Naoshi Baba

Proceedings Volume 6265, 62653T (2006) https://doi.org/10.1117/12.669626

KEYWORDS: Polarization, Imaging systems, Wave plates, Polarizers, Modulation, Bandpass filters, Exoplanets, Interference filters, Speckle, Prisms

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Proceedings Article | 20 January 2006 Paper

Image acquisition and processing using a PC cluster toward real-time solar image improvement

Noriaki Miura, Naoki Kodama, Hiroshi Ohkama, Hideaki Odagiri, Naoshi Baba, Hiroshi Kita, Reizaburou Kitai, Satoru Ueno, Kiyoshi Ichimoto, Takashi Sakurai

Proceedings Volume 6027, 60274T (2006) https://doi.org/10.1117/12.668625

KEYWORDS: Image processing, Image acquisition, Image segmentation, Imaging systems, Cameras, Observatories, Spatial resolution, CCD cameras, Control systems, Deconvolution

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Proceedings Article | 31 August 2005 Paper

Objective spectrometer for exoplanets based on nulling polarization interferometry

Naoshi Baba, Naoshi Murakami, Youko Tate, Yoichiro Sato, Motohide Tamura

Proceedings Volume 5905, 590512 (2005) https://doi.org/10.1117/12.615623

KEYWORDS: Exoplanets, Polarization, Spectroscopy, Coronagraphy, Lamps, Wave plates, Speckle, Interferometry, Halogens, Polarizers

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Proceedings Article | 12 October 2004 Paper

Two-channel polarization interferometric coronagraph to improve the detectability of extrasolar planets

Naoshi Murakami, Tasuku Maeda, Naoshi Baba, Tsuyoshi Ishigaki, Nobuyuki Hashimoto, Motohide Tamura

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.549548

KEYWORDS: Coronagraphy, Planets, Polarization, Exoplanets, Polarizers, Interferometry, Stars, Beam splitters, Lamps, Signal to noise ratio

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Proceedings Article | 3 March 2003 Paper

Nulling stellar coronagraph using liquid-crystal device

Naoshi Murakami, Naoshi Baba, Tsuyoshi Ishigaki, Nobuyuki Hashimoto

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.457651

KEYWORDS: Polarization, Polarizers, Liquid crystals, Phase shifts, Coronagraphy, Light sources, Stars, Nulling interferometry, Molecules, Exoplanets

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Proceedings Article | 21 February 2003 Paper

Nulling interferometer with geometric phase modulator

Naoshi Baba, Naoshi Murakami, Tsuyoshi Ishigaki

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458082

KEYWORDS: Polarization, Interferometers, Modulators, Phase shift keying, Phase shifts, Nulling interferometry, Stars, Planets, Lamps, Polarizers

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Proceedings Article | 17 January 2002 Paper

Static Fourier-transform spectrometer based on Savart polariscope

Gao Zhan, Kazuhiko Oka, Tsuyoshi Ishigaki, Naoshi Baba

Proceedings Volume 4480, (2002) https://doi.org/10.1117/12.453340

KEYWORDS: Spectroscopy, Fourier transforms, Charge-coupled devices, Sensors, Sagnac interferometers, Interferometers, Mirrors, Beam splitters, Imaging systems, Polarizers

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Proceedings Article | 8 May 2001 Paper

Novel Fourier transform imaging spectrometer

Gao Zhan, Kazuhiko Oka, Tsuyoshi Ishigaki, Naoshi Baba

Proceedings Volume 4416, (2001) https://doi.org/10.1117/12.427064

KEYWORDS: Spectroscopy, Fourier transforms, Lithium, Optical engineering, Optical sensing, Nanotechnology

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Proceedings Article | 19 July 1999 Paper

Superresolution applied to solar granulation images

Noriaki Miura, Naoshi Baba, Takashi Sakurai

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.355037

KEYWORDS: Super resolution, Telescopes, Deconvolution, Image resolution, Diffraction, Fourier transforms, Optical transfer functions, Atmospheric optics, Atmospheric turbulence, Applied physics

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Proceedings Article | 19 July 1999 Paper

Application of shift-and-add method to reconstruction of solar granulation

Naoshi Baba, Noriaki Miura, Takashi Sakurai

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.355060

KEYWORDS: Image stacking, Atmospheric optics, Image restoration, Reconstruction algorithms, Atmospheric turbulence, Speckle imaging, Telescopes, Speckle, Applied physics, Astronomy

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Proceedings Article | 1 September 1996 Paper

High resolution imaging with reference to a widely separated star

Naoshi Baba

Proceedings Volume 2778, 2778DJ (1996) https://doi.org/10.1117/12.2316176

KEYWORDS: Stars, Image resolution, Adaptive optics, Advanced distributed simulations, Image stacking, Speckle, Observatories, Cameras, Applied physics, Spatial resolution

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Proceedings Article | 1 July 1990 Paper

Reconstruction of a small phase object from its projected interferograms

Kazumi Murata, Naoshi Baba, Noriaki Miura, Kunihiko Mori

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.22204

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Showing 5 of 37 publications

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