OKA Kazuhiko

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Name
OKA Kazuhiko
Affiliation
Hokkaido University
Section
Faculty of Engineering, Division of Applied Physics
Job title
Associate Professor
Degree
Doctor of Engineering(Hokkaido University)

Research Areas

 
 

Committee Memberships

 
2007
   
 
SPIE  Symposia Committee, Committee Member
 
2007
 - 
2010
SPIE  Scholarship Committee, Committee Member
 
2008
 - 
2009
SPIE  Prism Awards for Photonics, Judge
 
2001
 - 
2004
Society of Instrument and Control Engineers, Japan (SICE)  Board of Directors of Hokkaido Branch
 

Awards & Honors

 
Oct 2015
科学研究費補助金審査員表彰, Japan Society for the Promotion of Science
 
May 2012
Senior Member, OSA
 
Jan 2009
Fellow, SPIE
 
Aug 2006
G. G. Stokes Award, SPIE
 
Aug 1990
Best Paper Award, SICE - Society of Instrument and Control Engineers
 

Published Papers

 
Masato Suzuki, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda, Ryuji Morita
Phys. Rev. A   94 043851   Oct 2016   [Refereed]
We derived the Berry connection of vector vortex states (VVSs) from the
"true" Hamiltonian obtained through the Maxwell--Schrödinger equation for an
inhomogeneous anisotropic (IA) medium, and we experimentally demonstrated
measurement of the cor...
K. Yamane, M. Sakamoto, N. Murakami, R. Morita, and K. Oka
Optics Letters   41(19) 4597-4600   Sep 2016   [Refereed]
Suzuki M, Yamane K, Oka K, Toda Y, Morita R
Scientific reports   5 17797   Dec 2015   [Refereed]
Moritsugu Sakamoto, Ryohei Fukumoto, Naoshi Murakami, Ryuji Morita, Ryuji Morita, Kazuhiko Oka
Optical Review      Feb 2015   [Refereed]
© 2015 The Optical Society of Japan We present the topological-charge-dispersion reduction scheme in optical vortex generation using axially symmetric half-wave plates (AHPs). The topological-charge dispersion caused by retardation errors of AHPs ...
Masato Suzuki, Keisaku Yamane, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda, Yasunori Toda, Ryuji Morita, Ryuji Morita
Optical Review      Mar 2015   [Refereed]
© 2015 The Author(s) The extended Stokes parameters for arbitrary cylindrically polarized beams are newly introduced to evaluate their quality. A set of the parameters, expressing a cylindrically polarized state, permits the definition of the degr...
Suzuki M, Yamane K, Oka K, Toda Y, Morita R
Optics express   22(14) 16903-16915   Jul 2014   [Refereed]
Murakami N, Hamaguchi S, Sakamoto M, Fukumoto R, Ise A, Oka K, Baba N, Tamura M
Optics express   21(6) 7400-7410   Mar 2013   [Refereed]
Sakamoto M, Oka K, Morita R, Murakami N
Optics letters   38(18) 3661-3664   Sep 2013   [Refereed]
Nathan Hagen, Kazuhiko Oka, Eustace L. Dereniak
Optics Letters   38 1675   May 2013
Kudenov MW, Escuti MJ, Hagen N, Dereniak EL, Oka K
Optics letters   37(8) 1367-1369   Apr 2012   [Refereed]
Kudenov MW, Escuti MJ, Dereniak EL, Oka K
Applied optics   50(15) 2283   May 2011   [Refereed]
Somekawa T, Oka K, Fujita M
Optics letters   35(22) 3811   Nov 2010   [Refereed]
Tokizane Y, Shimatake K, Toda Y, Oka K, Tsubota M, Tanda S, Morita R
Optics express   17(26) 24198-24207   Dec 2009   [Refereed]
Okabe H, Hayakawa M, Matoba J, Naito H, Oka K
The Review of scientific instruments   80(8) 083104   Aug 2009   [Refereed]
Tokizane Y, Oka K, Morita R
Optics express   17(17) 14517-14525   Aug 2009   [Refereed]
DeHoog E, Luo H, Oka K, Dereniak E, Schwiegerling J
Applied optics   48(9) 1663   Mar 2009   [Refereed]
Yukitoshi Otani, Toshitaka Wakayama, Kazuhiko Oka, Norihiro Umeda
Optics Communications   281(23) 5725-5730   Dec 2008   [Refereed]
A Mueller matrix polarimeter acquired for four-channeled spectra is proposed. Both the polarizing and analyzing optics of this system consist of a linear polarizer and a high-order retarder. The polarizing elements can modulate the polarization st...
Luo H, Oka K, DeHoog E, Kudenov M, Schiewgerling J, Dereniak EL
Applied optics   47(24) 4413   Aug 2008   [Refereed]
Hagen N, Oka K, Dereniak EL
Optics letters   32(15) 2100   Aug 2007   [Refereed]
Okabe H, Hayakawa M, Naito H, Taniguchi A, Oka K
Optics express   15(6) 3093-3109   Mar 2007   [Refereed]
Luo H, Oka K, Hagen N, Tkaczyk T, Dereniak EL
Applied optics   45(33) 8400-8409   Nov 2006   [Refereed]
Taniguchi A, Oka K, Okabe H, Hayakawa M
Optics letters   31(22) 3279-3281   Nov 2006   [Refereed]
H. T. Luo, T. Tkaczyk, E. L. Dereniak, K. Oka, R. Sampson
Optics Letters   31(5) 616-618   Mar 2006   [Refereed]
A high birefringence of over 0.21 for the yttrium vanadate (YVO 4) crystal in the middle wavelength infrared (i.e., 3-5 μm) was measured. A Fourier transform infrared spectrometer was employed in the channel spectra technique to obtain the measure...
Junichi Hamazaki, Yuriya Mineta, Kazuhiko Oka, Ryuji Morita
Optics Express   14(18) 8382-8392   Jan 2006   [Refereed]
Direct observation of Gouy phase shift on an optical vortex was presented through investigating the intensity profiles of a modified LGp m beam with an asymmetric defect, around at the focal point. In addition, the three-dimensional trajectory of ...
Mikio Yamashita, Masakatsu Hirasawa, Naoya Nakagawa, Kazuki Yamamoto, Kazuhiko Oka, Ryuji Morita, Akira Suguro
Journal of the Optical Society of America B: Optical Physics   21(2) 458-462   Jan 2004   [Refereed]
The 530-880-nm continuum pulse with a greatly asymmetric temporal profile over 500 fs and a spectral phase variation over 150 rad, which was generated by induced phase modulation (IPM) as well as self-phase modulation in a conventional fused-silic...
Yamane K, Zhang Z, Oka K, Morita R, Yamashita M, Suguro A
Optics letters   28(22) 2258-2260   Nov 2003   [Refereed]
Compact complete imaging polarimeter using birefringent wedge prisms.
Oka K, Kaneko T
Optics express   11(13) 1510-1519   Jun 2003   [Refereed]
Zhan G, Oka K, Ishigaki T, Baba N
Applied optics   41(4) 734-738   Feb 2002   [Refereed]
Kazuhiko Oka, Takayuki Kato
Optics Letters   24 1475-1477   Nov 1999   [Refereed]
We describe a novel method for the spectroscopic measurement of the state of polarization (SOP) of light. A pair of thick birefringent retarders is incorporated into the spectroscopic polarimeter, so the generated channeled spectrum is composed of...
Y. Ohtsuka, K. Oka
Applied Optics   33 2633-2636   May 1994   [Refereed]
This paper describes the construction and experimental results from a new interferometric polarimeter used for mapping a spatiotemporal change in the state of polarization (SOP) of an elliptically polarized beam of light, within the frequency band...
Tomoko Yamaguchi, Kazuhiko Oka, Yoshihiro Ohtsuka
Optical Review   1 276-277   Jan 1994   [Refereed]
This paper describes the mapping of the spatiotemporal principal stress distribution evolved with time in an epoxy photoelastic sample. In the optical heterodyne polarimeter exploited, the signal beam of light transmitted by the sample under conti...
K. Oka, Y. Ohtsuka
Experimental Mechanics   33 44-48   Mar 1993   [Refereed]
This paper describes a new photoelastic technique for the spatiotemporal stress analysis. In a polarimeter developed, an elliptically polarized signal beam of light, modulated in state of polarization by two-dimensional principal-stress distributi...
K. Oka, Y. Ohtsuka
Optics Communications   92 1-5   Aug 1992   [Refereed]
This paper describes a novel polarization heterodyne interferometer with another local oscillator beam for the precision measurement of phase retardation. The excess phase deviation from an ideal linear retardation output always exists in the conv...
Y. Ohtsuka, H. Matsubara, K. Oka
Pure and applied optics   1 227-239   Jul 1992   [Refereed]
Optical mutual intensity can be controlled by the variable intensity distribution of an extended quasi-monochromatic incoherent source. A point source with a conceptually variable intensity, moving stepwise over the source plane, is capable of pro...
K. Oka, M. Tsukada, Y. Ohtsuka
Measurement Science and Technology   2 106-110   Dec 1991   [Refereed]
A real-time, wideband phase demodulator from which phase fluctuations extending over 2 pi radians can be taken out is designed for use in optical heterodyne detection processes. A phase-locked-loop (PLL) frequency multiplier, aided by compensation...
Satoshi Tanaka, Kazuhiko Oka, Yoshihiro Ohtsuka
Journal of Lightwave Technology   9 135-140   Jan 1991   [Refereed]
A method is described for carrying out statistical processing of the individual phases of all the modes guided in a perturbed birefringent single-mode fiber. The method is based on optical heterodyne detection processes using a signal beam with or...
Kazuhiko Oka, Masato Tsukada, Yoshihiro Ohtsuka
Journal of Lightwave Technology   8 1482-1486   Oct 1990   [Refereed]
An optical heterodyne correlation-processing system is devised to process the phase fluctuations of the orthogonal linearly polarized two-frequency components guided in a length of axially vibrating birefringent single-mode fiber. Two wideband pha...
OKA
Keisoku Jidouseigyo Gakkai Ronbunsyu   25(3) p271-277   Mar 1989   [Refereed]
Kazuhiko Oka, Tomoaki Takeda, Yoshihiro Ohtsuka
Sensors and Actuators: A. Physical   22 438-441   Jan 1989   [Refereed]
A dual-fiber-coil polarization interferometric sensor using paired fibers is fabricated by use of a newly developed high-birefringence single-mode PANDA fiber with rectangular-shaped cladding. The birefringent axes of the paired fibers are aligned...

Misc

 
Moritsugu Sakamoto, Keisaku Yamane, Keisaku Yamane, Naoshi Murakami, Ryuji Morita, Ryuji Morita, Kazuhiko Oka
Frontiers in Optics, FiO 2014      Jan 2014
© 2014 Optical Society of America. A novel optical system of a ring-shaped optical-lattice generator using axially-symmetric polarization elements is presented. A series of axially-symmetric polarization elements incorporated into the configuratio...
Michael W. Kudenov, Sushmit Mallik, Michael J. Escuti, Nathan Hagen, Kazuhiko Oka, Eustace L. Dereniak
Proceedings of SPIE - The International Society for Optical Engineering   8897    Dec 2013
A novel way to measure the Mueller matrix image enables a sample's diattenuation, retardance, and depolarization to be measured within a single camera integration period. Since the Mueller matrix components are modulated onto coincident carrier fr...
Kazuhiko Oka, Yujin Haga, Yoshihiko Komaki
Proceedings of SPIE - The International Society for Optical Engineering   8873    Dec 2013
Several implementations of spectroscopic polarimeters using spatial carriers are presented. The first implementation incorporates two Savart plates and a spectrometer including a two-dimensional CCD to generate a spectrum with spatial carriers. Th...
Naooki Saito, Satoru Odate, Katsura Otaki, Masahiro Kubota, Rintaro Kitahara, Kazuhiko Oka
Proceedings of SPIE - The International Society for Optical Engineering   8873    Dec 2013
Without moving parts, the snapshot imaging polarimeter utilizing Savart plates is capable of stable and fast measurements of spatiallly distributed Stokes parameters. To increase feasibility of the optical design, we propose modifications that ena...
Moritsugu Sakamoto, Kazuhiko Oka, Ryuji Morita, Naoshi Murakami
Optics InfoBase Conference Papers      Jan 2013
A novel method to generate a ring-shaped optical lattice is developed. Combination of axially-symmetric polarization elements and an external modulator, giving copropagating interfer- ence between vortices, enables the rapid rotation of lattices w...
Naoshi Murakami, Jun Nishikawa, Wesley A. Traub, Dimitri Mawet, Dimitri Mawet, Dwight C. Moody, Brian D. Kern, John T. Trauger, Eugene Serabyn, Shoki Hamaguchi, Fumika Oshiyama, Moritsugu Sakamoto, Akitoshi Ise, Kazuhiko Oka, Naoshi Baba, Hiroshi Murakami, Motohide Tamura
Proceedings of SPIE - The International Society for Optical Engineering   8442    Dec 2012
Photonic crystal, an artificial periodic nanostructure of refractive indices, is one of the attractive technologies for coronagraph focal-plane masks aiming at direct imaging and characterization of terrestrial extrasolar planets. We manufactured ...
Kazuhiko Oka, Takahiro Kinoshita
Proceedings of SPIE - The International Society for Optical Engineering   8493    Dec 2012
A novel method for the wavelength-scanning interferometry is developed by use of the channeled spectroscopic polarization state generator (CSPSG), consisting of a polarizer and two high-order birefringent retarders, and the polarimetric common-pat...
Moritsugu Sakamoto, Kazuhiko Oka, Ryuji Morita
Proceedings of SPIE - The International Society for Optical Engineering   8274    Mar 2012
We previously developed an achromatic method for the generation of the white-light optical and polarization vortices using axially-symmetric polarizer (ASP). In the present presentation, we report the experimental study on the Fresnel diffraction ...
Toshihiro Somekawa, Kazuhiko Oka, Masayuki Fujita, Masayuki Fujita
Proceedings of SPIE - The International Society for Optical Engineering   8182 81820X   Nov 2011
We have been developing white light lidar using a terawatt laser system at 800 nm, which generates a coherent white light continuum in the wavelength range from 300 nm to more than 2200 nm. The white light lidar has the advantage of performing the...
Kazuhiko Oka, Takahiro Kinoshita, Akitoshi Ise
Proceedings of SPIE - The International Society for Optical Engineering   8160 81600S   Oct 2011
The channeled spectropolarimeter using a wavelength-scanning laser and a channeled spectroscopic polarization state generator is discussed. This implementation has a feature that it is applicable for the spatial mapping of the polarimetric paramet...
Michael W. Kudenov, Michael J. Escuti, Eustace L. Dereniak, Kazuhiko Oka
Proceedings of SPIE - The International Society for Optical Engineering   8160 81600V   Oct 2011
A snapshot channeled linear imaging (CLI) polarimeter is demonstrated by incorporating two identical polarization gratings (PGs) into a shearing polarization interferometer. Placing the PGs in series causes the shear to become linearly proportiona...
Dimitri Mawet, 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 of SPIE - The International Society for Optical Engineering   8151 815108   Oct 2011
The Vector Vortex Coronagraph (VVC) is one of the most attractive new-generation coronagraphs for ground- and space-based exoplanet imaging/characterization instruments, as recently demonstrated on sky at Palomar and in the laboratory at JPL, and ...
Analysis of diffraction image due to surface micro-geometry for an optical profiling sensor by the focus detection method
Journal of the Japan Society for Precision Engineering   77(4) 428-432   2011
Yu Tokizane, Kazuhiko Oka, Ryuji Morita
Optics InfoBase Conference Papers      Dec 2010
Ultrabroadband polarization vortex generation ranging ~600 to ~800nm without polarization dispersion was demonstrated using a photonic-crystal radial polarizer. It enables us to investigate closed-loop coherence in the ultrashort temporal and/or u...
Yu Tokizane, Kazuhiko Oka, Ryuji Morita
Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference: 2010 Laser Science to Photonic Applications, CLEO/QELS 2010      Oct 2010
Ultrabroadband polarization vortex generation ranging ∼600 to ∼800 nm without polarization dispersion was demonstrated using a photonic-crystal radial polarizer. It enables us to investigate closed-loop coherence in the ultrashort temporal and/or ...
OKA Kazuhiko
Japanese journal of optics   39(8) 379-384   Aug 2010
K. Oka, H. Okabe, M. Hayakawa, J. Matoba, H. Naito
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest      Dec 2009
Channeled Spectropolarimetry is a snapshot method to measure the spectrally-resolved state of polarization of light. The basic features of the method are reviewed in this presentation. Its application for the spectroscopic ellipsometry is also des...
K. Oka, H. Okabe, M. Hayakawa, J. Matoba, H. Naito
Optics InfoBase Conference Papers      Dec 2009
Channeled Spectropolarimetry is a snapshot method to measure the spectrally-resolved state of polarization of light. The basic features of the method are reviewed in this presentation. Its application for the spectroscopic ellipsometry is also des...
Yu Tokizane, Katsuhiro Shimatake, Yasunori Toda, Kazuhiko Oka, Masakatsu Tsubota, Satoshi Tanda, Ryuji Morita
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference      Nov 2009
MORITA Ryuji, TOKIZANE Yu, OKA Kazuhiko
The Review of laser engineering   37(11) 801-805   Nov 2009
Yu Tokizane, Katsuhiro Shimatake, Yasunori Toda, Kazuhiko Oka, Masakatsu Tsubota, Satoshi Tanda, Ryuji Morita
Optics InfoBase Conference Papers      Jan 2009
Kazuhiko Oka, Ryosuke Suda, Masayuki Ohnuki, Darren Miller, Eustace L. Dereniak
Optics InfoBase Conference Papers      Jan 2009
The imaging polarimeter using the Savart plates is modified for use with the polychromatic light by incorporating an imaging system utilizing diffractive lenses. Its feasibility is numerical simulated for the visible light with 50 nm-bandwidth. © ...
Yu Tokizane, Taisuke Ogoshi, Atsushi Taniguchi, Kazuhiko Oka, Ryuji Morita
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series      Sep 2008
The generation method of spalial-dispersion-free optical vortices using polarization singularity due to an axially-symmetric polarizer was proposed and demonstrated with an ultrabroad-band light (∼350 to ∼ 1000 nm) and an ultrashort optical pulse ...
Yukitoshi Otani, Toshitaka Wakayama, Kazuhiko Oka, Norihiro Umeda
Optics InfoBase Conference Papers      Jan 2008
A Mueller matrix polarimeter acquired for four channeled spectra is proposed by both polarizing and analyzing optics with high-order retarder. Nine elements of the matrix can be deconvoluted without modifying the configuration of polarizing and an...
Kazuhiko Oka, Sho Endo, Atsushi Taniguchi, Hiroshi Okabe
Proceedings of SPIE - The International Society for Optical Engineering   6682    Dec 2007
This paper describes a new configuration of the channeled spectropolarimeter and its application for the spectroscopic measurement of Mueller matrix. The new configuration uses the channeled spectroscopic polarization state generator (CSPSG) consi...
K. Hazu, K. Narita, Y. Sakakibara, K. Oka, T. Sekikawa, M. Yamashita
Conference on Lasers and Electro-Optics, 2007, CLEO 2007      Dec 2007
A spatial light phase modulator with a high transmission> 85% (260-1100 nm) and a phase modulation capability of 53 radian at 260 nm and 12 radian at 1100 nm has been developed for the first time. © 2006 Optical Society of America.
K. Hazu, K. Narita, Y. Sakakibara, K. Oka, T. Sekikawa, M. Yamashita
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series      Dec 2007
A spatial light phase modulator with a high transmission> 85% (260-1100 nm) and a phase modulation capability of 53 radian at 260 nm and 12 radian at 1100 nm has been developed for the first time. ©2006 Optical Society of America.
K. Hazu, K. Narita, Y. Sakakibara, K. Oka, T. Sekikawa, M. Yamashita
Optics InfoBase Conference Papers      Jan 2007
A spatial light phase modulator with a high transmission> 85% (260-1100 nm) and a phase modulation capability of 53 radian at 260 nm and 12 radian at 1100 nm has been developed for the first time. © 2006 Optical Society of America.
K. Hazu, K. Narita, Y. Sakakibara, K. Oka, T. Sekikawa, M. Yamashita
Optics InfoBase Conference Papers      Jan 2007
A spatial light phase modulator with a high transmission> 85% (260-1100 nm) and a phase modulation capability of 53 radian at 260 nm and 12 radian at 1100 nm has been developed for the first time. © 2006 Optical Society of America.
K. Hazu, K. Narita, Y. Sakakibara, K. Oka, T. Sekikawa, M. Yamashita
Optics InfoBase Conference Papers      Jan 2007
A spatial light phase modulator with a high transmission> 85% (260-1100 nm) and a phase modulation capability of 53 radian at 260 nm and 12 radian at 1100 nm has been developed for the first time. © 2006 Optical Society of America.
Atsushi Taniguchi, Kazuhiko Oka, Hiroshi Okabe, Hitoshi Naito, Nobuo Nakatsuka
Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006      Dec 2006
Miniaturized sensing head for the spectroscopic analysis of polarization is developed based on the channeled spectropolarimetry. All the spectrally-resolved Stokes parameters are determined at once with the sensing head whose section is 7.1 mm squ...
Kazuhiko Oka, Naooki Saito
Proceedings of SPIE - The International Society for Optical Engineering   6295    Nov 2006
An interferometric method for measuring the two-dimensional distribution of the state of polarization (SOP) of light is presented. A pair of Savart plates, a half-wave plate, and an analyzer are inserted between the lenses of a double-diffraction ...
Hiroshi Okabe, Kenichi Matoba, Masayuki Hayakawa, Atsushi Taniguchi, Kazuhiko Oka, Hitoshi Naito, Nobuo Nakatsuka
Proceedings of SPIE - The International Society for Optical Engineering   5878 1-8   Dec 2005
A novel configuration for the channeled spectroscopic ellipsometer (CSE) is presented. The channeled spectroscopic ellipsometry is a snapshot method for the spectrally-resolved polarization analysis. In this method, multiple-order retarders are ut...
Atsushi Taniguchi, Hiroshi Okabe, Hitoshi Naito, Nobuo Nakatsuka, Kazuhiko Oka
Proceedings of SPIE - The International Society for Optical Engineering   5888 1-8   Dec 2005
A novel design of the channeled spectropolarimeter suited for stable operation is presented. An integrated polarization analyzing optics made of calcite is used together with a novel signal processing procedure to add the self-recalibration featur...
OKA Kazuhiko
Japanese journal of optics   31(4) 236-238   Apr 2002
Kazuhiko Oka
Proceedings of SPIE - The International Society for Optical Engineering   4919 167-175   Jan 2002
This paper describes the channeled spectropolarimetry capable of the singleshot measurement of the state of polarization (SOP) of polychromatic light. A pair of fairly-thick birefringent retarders are incorporated into the polarimeter so that all ...
Gao Zhan, Kazuhiko Oka, Tsuyoshi Ishigaki, Naoshi Baba
Proceedings of SPIE - The International Society for Optical Engineering   4480 198-203   Jan 2002
To avoid the drawbacks of conventional Fourier transform spectrometer (CFTS) based on the Michelson interferometer which needs a scanning system to acquire the interferogram in the temporal domain, the static Fourier transform (StFT) spectrometer ...
Kazuhiko Oka, Takayuki Kato
Proceedings of SPIE - The International Society for Optical Engineering   4481 137-140   Jan 2002
This paper describes a novel spectroscopic ellipsometer using no mechanical or active components for polarization modulation. A pair of fairly-thick birefringent retarders are incorporated into the ellipsometer so that the spectrally-resolved elli...
G. Zhan, K. Oka, T. Ishigaki, N. Baba
Proceedings of SPIE - The International Society for Optical Engineering   4416 264-267   Jan 2001
A Fourier-transform imaging spectrometer based-on Savart polariscope was described. The effects on the interferogram due to pixel size in the spectrometer were analyzed. Parts of the pixels of the charge couple device (CCD) detectors were used to ...
Ryuji Morita, Hirotaka Yanagisawa, Mikio Yamashita, Kazuhiko Oka
Molecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics   22 409-412   Dec 1999
The optically heterodyne-detected optical Kerr effect measurement in β, β-carotene solutions was performed. The signal was instantaneous and negative, depending on the third-power of the input power. It was found that this signal is due to the two...
Kazuhiko Oka, Takayuki Katoh
Proceedings of SPIE - The International Society for Optical Engineering   3749 681-682   Jan 1999
This paper presents a novel method for the spectroscopic measurement of the state of polarization of light. A pair of thick retarders made of quartz are incorporated into the polarimeter to obtain a broadband spectrum including three quasi-sinusoi...
OKA Kazuhiko
Japanese journal of optics   27(12) 709-715   Dec 1998
OKA Kazuhiko
Journal of the Japan Society of Precision Engineering   64(9) 1285-1288   Sep 1998
Kazuhiko Oka
Handbook of Sensors and Actuators   3 99-108   Dec 1996
The concept and the features of the adaptive sensor system are described. Emphasis is given to the fact that sensing performance is automatically optimized in the adaptive sensor system. Some examples, including the adaptive velocity sensing syste...
Yasushi Sawada, Kazuhiko Oka, Yoshihiro Ohtsuka
Proceedings of SPIE - The International Society for Optical Engineering   2778 288-289   Dec 1996
This paper presents a numerical study on the phase retardation between the s- And p-polarized component waves of light scattered from a copper rough surface. The results are discussed together with the four parameters, incident angle, scattering a...
Kazuhiko Oka, Futoshi Nagaoka, Sachiko Kawada, Yoshihiro Olitsuka
Proceedings of SPIE - The International Society for Optical Engineering   2778 405-406   Dec 1996
This paper presents a novel method for controlling the spatial coherence of illumination in an imago forming system. A liquid-crystal spatial phase-modulator is used for controlling it in the object plane Copyright © 1996 The Society of Photo-Opti...
OKA Kazuhiko
システム/制御/情報 : システム制御情報学会誌 = Systems, control and information   40(10) 430-436   Oct 1996
KADONO Hirofumi, OKA Kazuhiko
Japanese journal of optics   25(4) 185-188   Apr 1996
Kazuhiko Oka, Tomoko Yamaguchi, Yoshihiro Ohtsuka
Proceedings of SPIE - The International Society for Optical Engineering   2265 40-47   Dec 1994
A novel method for mapping spatiotemporal strain distributions in a photoelastic sample is described. In an optical heterodyne polarimeter developed, a circularly polarized beam of light is transmitted by a photoelastic sample which is being loade...
Kazuhiko Oka, Junji Ikeda, Yoshihiro Ohtsuka
Proceedings of SPIE - The International Society for Optical Engineering   1983 728-729   Dec 1993
A novel method for mapping two-dimensional time-sequential birefringent in an anti-ferroelectric liquid crystal cell is described. Since there remain space and time dependent irregularities in birefringence, the elliptically polarized beam of ligh...
Yoshihiro Ohtsuka, Kazuhiko Oka
Proceedings of SPIE - The International Society for Optical Engineering   1746 42-48   Dec 1992
A novel polarimeter for mapping the spatiotemporal state of polarization (SOP) of light is presented. A reference beam of light consisting of orthogonal linearly polarized two components interferes with an elliptically polarized signal beam whose ...
Y. Ohtsuka, H. Matsubara, K. Oka
Proceedings of SPIE - The International Society for Optical Engineering   1319 408-409   Dec 1990
Pseudo coherence-controllable illumination can be offered by means of opto-electronics implementation, based on the van Cittert-Zernike theorem. Image shaping is exemplified for a knife-edge object. Since any image is deformable more or less with ...
K. Oka, T. Takeda, Y. Ohtsuka
Proceedings of SPIE - The International Society for Optical Engineering   1319 586-587   Dec 1990
A novel system for mapping the spatial distribution of a time varying state of polarization (SOP) is developed on the basis of optical heterodyne detection techniques using the Fourier-transformation for fringe analyzing. A signal beam is photomix...
S. Tanaka, K. Oka, Y. Ohtsuka
Proceedings of SPIE - The International Society for Optical Engineering   1319 122   Dec 1990
Statistical Studies are made of the phase fluctuations of all the guided modes including cross-coupled modes, propagating in a highly birefringent PANDA fiber. The fluctuating phases are demodulated from the generated beat-photocurrents and proces...

Works

 
Polarimetry with a channeled spectrum using a coherent white light continuum
2009

Research Grants & Projects

 
Spectroscopic Polarimetry and Imaging Polarimetry