Prof. Kazuhiko Oka Profile

Prof. Kazuhiko Oka

Professor at Hirosaki Univ

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 27 October 2021 Paper

Spectroscopic polarization measurement and control using channeled spectrum

Kazuhiko Oka, Keisaku Yamane, Moritsugu Sakamoto, Ryuji Morita

Proceedings Volume 11927, 119270N (2021) https://doi.org/10.1117/12.2616272

KEYWORDS: Polarization, Wave plates, Spectroscopy, Polarimetry, Modulation, Ultrafast phenomena, Polarization control, Spectroscopes, Ultrafast laser spectroscopy, Head

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Proceedings Article | 15 June 2020 Paper

Ultrafast azimuth rotation of linearly polarized beam by use of a chirped optical pulse pair

Rin Sasaki, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda, Takashige Omatsu, Ryuji Morita

Proceedings Volume 11522, 1152205 (2020) https://doi.org/10.1117/12.2573525

KEYWORDS: Polarization, Ultrafast phenomena, Polarization control, Terahertz radiation, Spatial light modulators, Polarimetry, Wave plates, Beam splitters, Applied physics, Mechanical engineering

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SPIE Journal Paper | 10 August 2019

Alignment accuracy of gradient-index rod lens in an array

Akihiro Yamamura, Kazuhiko Oka, Norihiko Nishiguchi

OE, Vol. 58, Issue 08, 085102, (August 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.8.085102

KEYWORDS: GRIN lenses, Gradient-index optics, Geometrical optics, Medical imaging, Image restoration, Optical engineering, Light emitting diodes, Printing, Refractive index, Light sources

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Proceedings Article | 22 February 2018 Presentation + Paper

Generation of arbitrary axisymmetrically polarized pulses with a broadband spectrum

Ryuji Morita, Masato Suzuki, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda

Proceedings Volume 10549, 105490P (2018) https://doi.org/10.1117/12.2294491

KEYWORDS: Polarization, Spatial light modulators, Amplitude modulation, Modulation, Interferometers, Elliptical polarization, Fringe analysis, Dispersion, Wave plates

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Proceedings Article | 7 September 2017 Paper

Hyperspectroscopic Mueller-matrix polarimeter based on channeled polarimetry

Kazuhiko Oka, Kodai Sayama, Hiroshi Michida

Proceedings Volume 10407, 104070M (2017) https://doi.org/10.1117/12.2273723

KEYWORDS: Polarimetry, Polarization, Spectroscopy, Modulation, Statistical analysis, Hyperspectral imaging, Hyperspectral systems, Imaging systems, Imaging spectroscopy, Light

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Proceedings Article | 18 April 2017 Paper

Generation of intense ultrafast-rotating ring-shaped optical lattices with programmable control of rotational symmetry

Keisaku Yamane, Kohei Iwasa, Kohei Kakizawa, Kazuhiko Oka, Yasunori Toda, Ryuji Morita

Proceedings Volume 10252, 102520F (2017) https://doi.org/10.1117/12.2275015

KEYWORDS: Terahertz radiation, Optical amplifiers, Spatial light modulators, Ultrafast phenomena, Optical damage, Sapphire lasers, Picosecond phenomena, Optical testing, Optical vortices, Computer generated holography

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Proceedings Article | 1 September 2015 Paper

Snapshot Mueller-matrix spectropolarimeter using spectral and spatial carriers

Kazuhiko Oka, Yujin Haga, Hiroshi Michida

Proceedings Volume 9613, 96130E (2015) https://doi.org/10.1117/12.2189698

KEYWORDS: Spectroscopy, Polarimetry, Polarization, Modulation, Wave plates, Statistical analysis, Charge-coupled devices, Polarizers, Mueller matrices, Spectral resolution

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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 | 22 October 2013 Paper

Snapshot imaging Mueller matrix instrument

Michael Kudenov, Sushmit Mallik, Michael Escuti, Nathan Hagen, Kazuhiko Oka, Eustace Dereniak

Proceedings Volume 8897, 88970S (2013) https://doi.org/10.1117/12.2028546

KEYWORDS: Polarimetry, Polarization, Modulation, Calibration, Wave plates, Prisms, Remote sensing, Interferometers, Statistical analysis, Staring arrays

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Proceedings Article | 27 September 2013 Paper

Wide field snapshot imaging polarimeter using modified Savart plates

Naooki Saito, Satoru Odate, Katsura Otaki, Masahiro Kubota, Rintaro Kitahara, Kazuhiko Oka

Proceedings Volume 8873, 88730M (2013) https://doi.org/10.1117/12.2022829

KEYWORDS: Polarimetry, Polarization, Surface plasmons, Calibration, Imaging systems, Distortion, Crystals, Prototyping, Optical design, Geometrical optics

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Proceedings Article | 27 September 2013 Paper

Spectroscopic full polarimeters using spatial carriers

Kazuhiko Oka, Yujin Haga, Yoshihiko Komaki

Proceedings Volume 8873, 88730R (2013) https://doi.org/10.1117/12.2025571

KEYWORDS: Spectroscopy, Polarimetry, Polarization, Spectral resolution, Optical testing, Prisms, Modulation, Polarizers, Charge-coupled devices, Optical filters

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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 | 13 September 2012 Paper

Wavelength-scanning polarimetric interferometry using channeled spectroscopic polarization state generator

Kazuhiko Oka, Takahiro Kinoshita

Proceedings Volume 8493, 849309 (2012) https://doi.org/10.1117/12.929724

KEYWORDS: Interferometers, Wave plates, Polarization, Polarimetry, Interferometry, Spectroscopy, Calibration, CCD cameras, Phase measurement, Modulation

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Proceedings Article | 11 February 2012 Paper

Diffraction characteristics of optical and polarization vortices generated by an axially symmetric polarizer

Moritsugu Sakamoto, Kazuhiko Oka, Ryuji Morita

Proceedings Volume 8274, 827414 (2012) https://doi.org/10.1117/12.910108

KEYWORDS: Polarization, Diffraction, Optical vortices, Near field diffraction, Spiral phase plates, Polarizers, Optical simulations, Superposition, Numerical simulations, Collimation

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Proceedings Article | 30 September 2011 Paper

Development of white light polarization lidar system

Toshihiro Somekawa, Kazuhiko Oka, Masayuki Fujita

Proceedings Volume 8182, 81820X (2011) https://doi.org/10.1117/12.897786

KEYWORDS: LIDAR, Polarization, Clouds, Copper, Krypton, Atmospheric particles, Aerosols, Atmospheric laser remote sensing, Backscatter, Wave plates

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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 | 10 September 2011 Paper

Channeled spectropolarimeter using a wavelength-scanning laser and a channeled spectroscopic polarization state generator

Kazuhiko Oka, Takahiro Kinoshita, Akitoshi Ise

Proceedings Volume 8160, 81600S (2011) https://doi.org/10.1117/12.894517

KEYWORDS: Spectroscopy, Wave plates, Polarization, Polarimetry, CCD cameras, Polarizers, Modulation, Statistical analysis, Semiconductor lasers, Light sources

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Proceedings Article | 10 September 2011 Paper

Spectrally broadband channeled imaging polarimeter using polarization gratings

Michael Kudenov, Michael Escuti, Eustace Dereniak, Kazuhiko Oka

Proceedings Volume 8160, 81600V (2011) https://doi.org/10.1117/12.893771

KEYWORDS: Polarimetry, Polarization, Staring arrays, Calibration, Modulation, Linear polarizers, Objectives, Diffraction, Image fusion, Liquid crystals

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Proceedings Article | 19 September 2007 Paper

Channeled spectroscopic polarization state generator (CSPSG) and its application to spectroscopic measurement of Mueller matrix

Kazuhiko Oka, Sho Endo, Atsushi Taniguchi, Hiroshi Okabe

Proceedings Volume 6682, 668203 (2007) https://doi.org/10.1117/12.736369

KEYWORDS: Spectroscopy, Polarization, Polarimetry, Wave plates, Light sources, Wavefronts, Calibration, Polarizers, Polysomnography, Statistical analysis

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Proceedings Article | 8 September 2006 Paper

Snapshot complete imaging polarimeter using Savart plates

Kazuhiko Oka, Naooki Saito

Proceedings Volume 6295, 629508 (2006) https://doi.org/10.1117/12.683284

KEYWORDS: Polarimetry, Video, Cameras, Polarization, Surface plasmons, Liquid crystals, Electrodes, Lenses, Polarization control, Image analysis

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Proceedings Article | 31 August 2005 Paper

New configuration of channeled spectropolarimeter for snapshot polarimetric measurement of materials

Hiroshi Okabe, Kenichi Matoba, Masayuki Hayakawa, Atsushi Taniguchi, Kazuhiko Oka, Hitoshi Naito, Nobuo Nakatsuka

Proceedings Volume 5878, 58780H (2005) https://doi.org/10.1117/12.616298

KEYWORDS: Wave plates, Spectroscopy, Head, Statistical analysis, Calibration, Polarimetry, Light sources, Silicon, Polarizers, Prototyping

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Proceedings Article | 18 August 2005 Paper

Stabilized channeled spectropolarimeter using integrated calcite prisms

Atsushi Taniguchi, Hiroshi Okabe, Hitoshi Naito, Nobuo Nakatsuka, Kazuhiko Oka

Proceedings Volume 5888, 588811 (2005) https://doi.org/10.1117/12.616185

KEYWORDS: Spectroscopy, Polarization, Calibration, Optical testing, Calcite, Wave plates, Prisms, Integrated optics, Prototyping, Signal processing

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Proceedings Article | 20 September 2002 Paper

Singleshot spectroscopic polarimetry using channeled spectrum

Kazuhiko Oka

Proceedings Volume 4919, (2002) https://doi.org/10.1117/12.465756

KEYWORDS: Spectroscopy, Polarimetry, Polarization, Wave plates, Thin films, Modulation, Lamps, Interferometry, Imaging spectroscopy, Remote sensing

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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 | 9 January 2002 Paper

Static spectroscopic ellipsometer based on optical frequency-domain interferometry

Kazuhiko Oka, Takayuki Kato

Proceedings Volume 4481, (2002) https://doi.org/10.1117/12.452883

KEYWORDS: Spectroscopy, Interferometry, Polarization, Thin films, Modulation, Wave plates, Silicon, Spectrum analysis, Statistical analysis, Spectroscopic ellipsometry

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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

Spectroscopic polarimeter based on optical frequency-domain interferometry

Kazuhiko Oka, Takayuki Kato

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354953

KEYWORDS: Polarimetry, Spectroscopy, Polarization, Interferometry, Wave plates, Quartz, Optical testing, Terahertz radiation, Spectroscopes, Birefringence

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Proceedings Article | 1 September 1996 Paper

Spatial coherence control for illumination by use of liquid-crystal spatial phase-modulator

Kazuhiko Oka

Proceedings Volume 2778, 27785J (1996) https://doi.org/10.1117/12.2299082

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Proceedings Article | 16 August 1996 Paper

Optical heterodyne polarimeter with spatiotemporal carrier frequencies for studying dynamic photoelastic stresses

Kazuhiko Oka, Yoshihiro Ohtsuka

Proceedings Volume 2873, (1996) https://doi.org/10.1117/12.246198

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An optical heterodyne polarimeter operating with spatiotemporal carrier frequencies is presented for contour mapping of dynamic principal stress distributions in an epoxy photoelastic sample. Introducing of the spatiotemporad carrier frequencies causes the temporal and spatial resolutions to be fairly improved in the mapping of the stress distributions. The major functional scheme of the polarimeter is illustrated in Fig. 1. A circularly polarized beam of light transmitted by the loaded photoelastic sample turns into an elliptically polarized signal beam, which is photomixed with a local oscillator beam consisting of orthogonal linearly polarized two-frequency components. At every pixel of the arrayed photodetector, the elliptically polarized signal beam is decomposed into orthogonal linearly polarized components to be interfered, respectively, with the counterpart v1 and UT components of the local oscillator beam. Since both the z' and z'2' components are tilted in wavefront at different angles to the signal beam, the resultant photourrentgenerated at every pixel involves two beat-components at different spatiotemporal carrier frequencies. The two beat-components can be filtered in the spatiotemporal frequency domain to irovicle significant information for mapping the principal stress distribution. The combination of the spatial and temporal carrier frequencies is capable of broadening the bandwidths in the spatial and temporal frequency domain compared with.those using only the spatial or temporal carrier frequencies [1]. The spatial and temporal bandwidths of the present polarimeter are found to be both approximately three times as wide as those of the previously reported optical heterodyne polarimeters [2,3]. Experimental demonstration was carried out using a Mach-Zehnder type optical heterodyne interferometer. The temporal and spatial bandwidths of the MOS type arrayed photodetector were set at 1033 Hz and 10 mm1 ,respectively, and.the temporal and spatial bandwidths for filtering were set at 500 Hz and 5 mm1, respectively. Under these conditions, the temporal and spatial bandwidths were 1 ms and 0.1 mm for mapping of the stress distributions. A sample plate of epoxy with a circular hole of 1.5 mm in diameter was used for the experiment. The top and bottom ends of the plate were supported, and an increasing force was applied from the left to the hole. The contour mapped resuits of the spatiotemporal stress distributions ar shown in Fig. 2. The first trace is the azimuth x ofthe principal stress a, and the second and third traces are the magnitudes of the orthogonal principal stresses o and a, respectively. The spacing of two successive contours of the azimuth is 15°, and that of the magnitudes is 2.0 x iO N/rn2. The tensile and compressive stresses are indicated, respectively, by positive and negative signs. As can be seen froth the figure, o. is tensile at the left of the hole, whereas 0qiscompressive at the right of the hole. The gradients of the principal stresses increase with time.

Proceedings Article | 16 August 1996 Paper

Retardation measurements of light scattered by metallic rough surfaces

Naoki Nagashima, Yasushi Sawada, Norimichi Shibuya, Kazuhiko Oka, Yoshihiro Ohtsuka

Proceedings Volume 2873, (1996) https://doi.org/10.1117/12.246206

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Proceedings Article | 14 September 1994 Paper

Spatiotemporal strain distribution mapping using novel optical heterodyne polarimeter

Kazuhiko Oka, Tomoko Yamaguchi, Yoshihiro Ohtsuka

Proceedings Volume 2265, (1994) https://doi.org/10.1117/12.186692

KEYWORDS: Photoelasticity, Cameras, Polarimetry, Heterodyning, Oscillators, Polarization, Beam splitters, Temporal resolution, Photoelastic analysis, Photodetectors

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Proceedings Article | 23 July 1993 Paper

Spatiotemporal birefringence measurements in an anti-ferroelectric liquid crystal cell by polarization interferometry

Kazuhiko Oka

Proceedings Volume 1983, 19838J (1993) https://doi.org/10.1117/12.2308726

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Proceedings Article | 11 December 1992 Paper

Polarimeter for mapping spatial distribution of dynamic state of polarization

Yoshihiro Ohtsuka, Kazuhiko Oka

Proceedings Volume 1746, (1992) https://doi.org/10.1117/12.138814

KEYWORDS: Polarimetry, Polarization, Cameras, Beam splitters, Polarization analysis, Video, Molybdenum, Mirrors, Photoelasticity, Fourier transforms

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Proceedings Article | 20 October 1992 Paper

Contour mapping of dynamic stress distributions by novel polarization interferometry

Kazuhiko Oka, Yoshihiro Ohtsuka

Proceedings Volume 1720, (1992) https://doi.org/10.1117/12.132142

KEYWORDS: Polarization, Photoelasticity, Cameras, Beam splitters, Molybdenum, Interferometry, Polarimetry, Photoelastic analysis, Optical components, Polarizers

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