Prof. Takamasa Suzuki Profile

Prof. Takamasa Suzuki

Professor at Niigata Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (98)

Proceedings Article | 8 December 2022 Paper

Interferometry with sinusoidal phase modulation method for measuring the phase of optical vortex

Haosen Pu, Osami Sasaki, Takamasa Suzuki, Samuel Choi

Proceedings Volume 12480, 124800B (2022) https://doi.org/10.1117/12.2660168

KEYWORDS: Spiral phase plates, Phase shift keying, Interferometry, Scanning probe microscopy, Phase measurement, Optical vortices, Spatial light modulators, Phase modulation, Gaussian beams, Computer generated holography

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Proceedings Article | 1 November 2021 Paper

Optical coherence tomography using nonstationary signal processing based on continuous wavelet transform

Takamasa Suzuki, Jiro Shimazaki, Osami Sasaki, Samuel Choi

Proceedings Volume 12057, 120574L (2021) https://doi.org/10.1117/12.2606987

KEYWORDS: Signal detection, Continuous wavelet transforms, Mirrors, Optical coherence tomography, Signal processing, Ferroelectric materials, Continuous wave operation, Wavelets, 3D metrology, Light sources

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Proceedings Article | 9 October 2021 Presentation + Paper

Large thickness measurement of glass plates with a spectrally resolved interferometer using two positions of a reference surface and a compensation glass

Kaining Zhang, Samuel Choi, Osami Sasaki, Songjie Luo, Takamasa Suzuki, Jixiong Pu

Proceedings Volume 11899, 118990A (2021) https://doi.org/10.1117/12.2601233

KEYWORDS: Signal detection, Glasses, Fourier transforms, Interferometers, Spectral resolution, Phase measurement

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SPIE Journal Paper | 26 March 2020

Vibration distribution measurement using downsampling phase-shifting interferometer

Yuta Ohara, Takamasa Suzuki, Samuel Choi, Osami Sasaki

OE, Vol. 59, Issue 03, 034112, (March 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.3.034112

KEYWORDS: Interferometers, Phase shifts, Signal detection, CCD cameras, Digital signal processing, Cameras, Signal processing, Optical engineering, Phase shift keying, Modulation

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Proceedings Article | 20 December 2019 Paper

Full-field optical coherence tomography with an acousto-optically tuned external-cavity laser diode

Takamasa Suzuki, Nariyasu Sugawara, Samuel Choi

Proceedings Volume 11209, 1120922 (2019) https://doi.org/10.1117/12.2547786

KEYWORDS: Continuous wavelet transforms, Diffraction gratings, Optical coherence tomography, Semiconductor lasers, Diffraction, Mirrors, Wavelets, Glasses, Ferroelectric materials, Light sources

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SPIE Journal Paper | 23 October 2019

Acousto-optically tuned external-cavity laser diode for optical coherence tomography with continuous wavelet transform

Takamasa Suzuki, Nariyasu Sugawara, Samuel Choi, Osami Sasaki

OE, Vol. 58, Issue 10, 104108, (October 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.10.104108

KEYWORDS: Semiconductor lasers, Continuous wavelet transforms, Optical coherence tomography, Diffraction gratings, Diffraction, Mirrors, Acousto-optics, Modulation, Wavelets, Ferroelectric materials

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Proceedings Article | 3 September 2019 Presentation + Paper

3D thickness measurement using pulse-driven optical coherence tomography based on wavelet transform

Takamasa Suzuki, Bin Liu, Samuel Choi

Proceedings Volume 11102, 111021A (2019) https://doi.org/10.1117/12.2534005

KEYWORDS: 3D metrology, Continuous wavelet transforms, Optical coherence tomography, Glasses, Continuous wave operation, Signal processing, Light sources, Signal detection, CCD cameras, Optical testing

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Proceedings Article | 8 November 2018 Paper

Advanced signal processing in a white-light scanning interferometer for exact surface profile measurement

Songjie Luo, Osami Sasaki, Samuel Choi, Takamasa Suzuki, Jixiong Pu

Proceedings Volume 10819, 108190N (2018) https://doi.org/10.1117/12.2502790

KEYWORDS: Signal detection, Interferometers, Signal processing, Fourier transforms, Cameras, Photodiodes, Bandpass filters, Light sources, Phase measurement

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Proceedings Article | 9 December 2015 Paper

Optical multi-frequency swept sensing for wide-field vibration measurement of interior surfaces in biological tissue

S. Choi, F. Nin, H. Hibino, T. Suzuki

Proceedings Volume 9792, 97920Q (2015) https://doi.org/10.1117/12.2204984

KEYWORDS: Tomography, Biomedical optics, Tissue optics, Biosensing, Optical sensing, Vibrometry, Optical coherence tomography, Heterodyning, Interferometry, 3D metrology, Natural surfaces, Tissues, Electronic filtering, Fourier transforms

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Proceedings Article | 24 September 2015 Paper

Two-dimensional thickness measurement using acousto-optically tuned external cavity laser diode

Takamasa Suzuki, Shingo Abe, Samuel Choi

Proceedings Volume 9628, 96281K (2015) https://doi.org/10.1117/12.2193027

KEYWORDS: Semiconductor lasers, Mirrors, Optical coherence tomography, Glasses, CCD cameras, Strontium, Camera shutters, Acousto-optics, Light sources, Diffraction gratings

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SPIE Journal Paper | 25 August 2015

Phase-shifting interferometer with pulse modulation based on a downsampling technique

Takuma Serizawa, Takamasa Suzuki, Samuel Choi

OE, Vol. 54, Issue 08, 085107, (August 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.8.085107

KEYWORDS: Modulation, Phase shifts, Mirrors, Interferometers, CCD cameras, Phase shift keying, Signal detection, Semiconductor lasers, Charge-coupled devices, Signal processing

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SPIE Journal Paper | 21 August 2014

Three-dimensional step–height measurement using sinusoidal wavelength scanning interferometer with four-step phase-shift method

Samuel Choi, Shouhei Takahashi, Osami Sasaki, Takamasa Suzuki

OE, Vol. 53, Issue 08, 084110, (August 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.8.084110

KEYWORDS: Interferometry, Interferometers, 3D scanning, Phase interferometry, Phase shifts, Signal detection, Charge-coupled devices, Phase measurement, Mirrors, Avalanche photodetectors

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Proceedings Article | 28 May 2014 Paper

Low-coherence interferometer using a pulsation laser diode

Takamasa Suzuki, Yusuke Ueno, Samuel Choi, Osami Sasaki

Proceedings Volume 9110, 911009 (2014) https://doi.org/10.1117/12.2050190

KEYWORDS: Optical coherence tomography, Semiconductor lasers, Interferometers, Spatial frequencies, Image sensors, Acousto-optics, CCD cameras, Visible radiation, Optical alignment, Cylindrical lenses

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Proceedings Article | 28 May 2014 Paper

Full-field step profile measurement with sinusoidal wavelength scanning interferometer

Samuel Choi, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 9110, 91100F (2014) https://doi.org/10.1117/12.2053539

KEYWORDS: Interferometers, Interferometry, Phase shifting, Charge-coupled devices, Phase shifts, Avalanche photodetectors, 3D metrology, Fourier transforms, Mirrors, Phase measurement

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Proceedings Article | 19 December 2013 Paper

Step-height measurement with a low coherence interferometer using continuous wavelet transform

Zhang Jian, Takamasa Suzuki, Samuel Choi, Osami Sasaki

Proceedings Volume 9046, 90461I (2013) https://doi.org/10.1117/12.2042640

KEYWORDS: Ferroelectric materials, Continuous wavelet transforms, Interferometers, Mirrors, Diodes, Electronic components, Michelson interferometers, Charge-coupled devices, Beam splitters, Semiconductor lasers

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Proceedings Article | 6 September 2013 Paper

Coaxial phase-shifting laser diode interferometer based on pulse modulation

Takamasa Suzuki, Takuma Serizawa, Osami Sasaki, Samuel Choi

Proceedings Volume 8839, 88390A (2013) https://doi.org/10.1117/12.2023531

KEYWORDS: Interferometers, Modulation, Phase shifts, CCD cameras, Phase shift keying, Mirrors, Semiconductor lasers, Imaging systems, High speed cameras, Cameras

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Proceedings Article | 6 September 2013 Paper

Surface profile measurement of a diffraction grating by a laser beam scanning interferometer using sinusoidal phase modulation

Osami Sasaki, Takuya Kubota, Samuel Choi, Takamasa Suzuki

Proceedings Volume 8839, 883906 (2013) https://doi.org/10.1117/12.2025328

KEYWORDS: Mirrors, Interferometers, Signal detection, Diffraction gratings, Polarization, Spatial resolution, Interferometry, Beam splitters, Phase shift keying, Phase modulation

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Proceedings Article | 6 September 2013 Paper

OCT based on multi-frequency sweeping Fizeau interferometer with phase modulating method

S. Choi, T. Watanabe, O. Sasaki, T. Suzuki

Proceedings Volume 8839, 88390D (2013) https://doi.org/10.1117/12.2023816

KEYWORDS: Signal detection, Charge-coupled devices, Optical coherence tomography, Modulation, Natural surfaces, Glasses, Fizeau interferometers, Fabry–Perot interferometers, Scanning probe microscopy, Tomography

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Proceedings Article | 22 June 2013 Paper

One-dimensional surface profile measurement by detection of reflecting direction of a scanned laser beam

Osami Sasaki, Ryo Shinozaki, Takamasa Suzuki

Proceedings Volume 8769, 876919 (2013) https://doi.org/10.1117/12.2020983

KEYWORDS: Mirrors, Phase modulation, Curium, Sensors, Inspection, Scanners, Spherical lenses, Laser beam propagation, Time metrology, Light sources

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Proceedings Article | 20 November 2012 Paper

Image detection of inner wall surface of holes in metal sheets through polarization using a 3D TV monitor

Takamasa Suzuki, Katsunori Nakano, Shogo Muramatsu, Toshiro Oitate

Proceedings Volume 8563, 85630Q (2012) https://doi.org/10.1117/12.999726

KEYWORDS: Polarization, 3D image processing, Polarizers, Inspection, Digital cameras, Image processing, Target detection, Metals, Digital imaging, 3D displays

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Proceedings Article | 20 November 2012 Paper

Multi-frequency sweeping interferometry using spatial optical frequency modulation

Samuel Choi, Heiichi Kato, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 8563, 856302 (2012) https://doi.org/10.1117/12.999555

KEYWORDS: Interferometry, Light sources, Distance measurement, Phase shift keying, Interferometers, Scanning probe microscopy, Mirrors, Phase measurement, Signal detection, Terahertz radiation

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Proceedings Article | 20 November 2012 Paper

Absolute measurement of optical surface profile with a Fizeau interferometer

Osami Sasaki, Akihiro Watanabe, Samuel Choi, Takamasa Suzuki

Proceedings Volume 8563, 85630B (2012) https://doi.org/10.1117/12.2000145

KEYWORDS: Wavefronts, Signal detection, Fizeau interferometers, Charge-coupled devices, Semiconductor lasers, Interferometers, Atrial fibrillation, Wavefront aberrations, Phase interferometry, Modulation

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Proceedings Article | 20 November 2012 Paper

Real-time displacement measurement using VCSEL interferometer

Takamasa Suzuki, Noriaki Yamada, Osami Sasaki, Samuel Choi

Proceedings Volume 8563, 85630K (2012) https://doi.org/10.1117/12.999720

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Sensors, Interferometers, Decision support systems, Signal processing, Phase shift keying, Interferometry, Ferroelectric materials, Feedback control

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Proceedings Article | 13 September 2012 Paper

Sinusoidal wavelength-scanning interferometer for profile measurement of metal surfaces

Osami Sasaki, Takahiro Kurashige, Samuel Choi, Takamasa Suzuki

Proceedings Volume 8493, 84930M (2012) https://doi.org/10.1117/12.929137

KEYWORDS: Interferometers, Metals, Signal detection, Interferometry, Phase shift keying, Light sources, Mirrors, Fourier transforms, Phase modulation, Wavefronts

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Proceedings Article | 30 November 2011 Paper

Online optical verification system for sheet-metal processing

Takamasa Suzuki, Kotaro Sato, Shogo Muramatsu, Mitsuyoshi Murata, Toshiro Oitate

Proceedings Volume 8201, 82010B (2011) https://doi.org/10.1117/12.906564

KEYWORDS: Digital cameras, Image processing, Digital imaging, Inspection, Scanners, Polarization, Polarizers, Imaging devices, Imaging systems, Digital image processing

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Proceedings Article | 14 September 2011 Paper

Profile measurement of thin films by linear wavenumber-scanning interferometry

Osami Sasaki, Satoshi Hirakubo, Samuel Choi, Takamasa Suzuki

Proceedings Volume 8133, 81330K (2011) https://doi.org/10.1117/12.894454

KEYWORDS: Thin films, Interferometers, Fourier transforms, Signal detection, Interferometry, Light sources, Mirrors, Silica, Error analysis, Signal processing

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Proceedings Article | 11 November 2010 Paper

Profile measurement based on spectral interferometer with multi-wavelength back-propagation methods

Kohei Otsuki, Samuel Choi, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 7855, 78550R (2010) https://doi.org/10.1117/12.870987

KEYWORDS: Interferometers, Scanning probe microscopy, Glasses, Mirrors, Charge-coupled devices, Signal detection, Interferometry, Phase shift keying, Phase modulation, Beam splitters

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Proceedings Article | 11 November 2010 Paper

Sinusoidal wavelength-scanning common-path interferometer with a beam-scanning system for measurement of film thickness variations

Osami Sasaki, Takafumi Morimatsu, Samuel Choi, Takamasa Suzuki

Proceedings Volume 7855, 78550S (2010) https://doi.org/10.1117/12.871030

KEYWORDS: Signal detection, Interferometers, Phase measurement, Thin films, Mirrors, Glasses, Phase shift keying, Scanners, Beam splitters, Spatial resolution

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Proceedings Article | 11 November 2010 Paper

Profilometry using Fizeau-interferometer based on optical comb interferometry and sinusoidal phase modulation method

Samuel Choi, Hidetaka Miyatsuka, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 7855, 78550K (2010) https://doi.org/10.1117/12.870985

KEYWORDS: Fabry–Perot interferometers, Interferometry, Fizeau interferometers, Scanning probe microscopy, Light sources, Precision measurement, Phase modulation, Signal detection, Phase shift keying, Interferometers

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Proceedings Article | 3 August 2010 Paper

Multiple-wavelength interferometers using backpropagation of optical fields for profile measurement of thin glass sheets

Osami Sasaki, Samuel Choi, Takamasa Suzuki

Proceedings Volume 7790, 77900U (2010) https://doi.org/10.1117/12.861534

KEYWORDS: Glasses, Interferometers, Signal detection, Lawrencium, Geometrical optics, Autoregressive models, Phase interferometry, Refractive index, Interferometry, CCD image sensors

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Proceedings Article | 26 February 2010 Paper

VCSEL's frequency stabilization of an external cavity diode laser: countermeasures against atmospheric temperature variations

Mutsuki Motojima, Kohei Doi, Takashi Sato, Masashi Ohkawa, Takamasa Suzuki

Proceedings Volume 7597, 75972A (2010) https://doi.org/10.1117/12.840609

KEYWORDS: Semiconductor lasers, Vertical cavity surface emitting lasers, Laser stabilization, Telecommunications, Optical communications, Signal detection, Fabry–Perot interferometers, Singular optics, Laser systems engineering, Mirrors

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SPIE Journal Paper | 1 February 2010 Open Access

Static wavelength scanning using tunable external cavity laser diode

Takamasa Suzuki, Ryuichi Nagai, Osami Sasaki

OE, Vol. 49, Issue 02, 020502, (February 2010) https://doi.org/10.1117/12.10.1117/1.3306642

KEYWORDS: Semiconductor lasers, Mirrors, Diffraction, Interferometers, Diffraction gratings, Crystals, Optical engineering, Acousto-optics, Antireflective coatings, Electro optics

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Proceedings Article | 20 November 2009 Paper

A tunable external cavity laser diode with no mechanical movement

Takamasa Suzuki, Ryuichi Nagai, Osami Sasaki

Proceedings Volume 7511, 75110O (2009) https://doi.org/10.1117/12.839828

KEYWORDS: Mirrors, Diffraction, Semiconductor lasers, Ferroelectric materials, Interferometers, Diffraction gratings, Light sources, Wavelength tuning, Crystals, Modulation

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Proceedings Article | 10 September 2009 Paper

Inner surface profile measurement of a hydrodynamic bearing by an oblique incidence and two-wavelength interferometer

Osami Sasaki, Ryota Yamamura, Kazushi Yokoyama, Takamasa Suzuki

Proceedings Volume 7432, 74320J (2009) https://doi.org/10.1117/12.827352

KEYWORDS: Interferometers, Stereolithography, Collimation, CCD image sensors, Signal detection, Beam splitters, Charge-coupled devices, Semiconductor lasers, Americium, Mirrors

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Proceedings Article | 3 February 2009 Paper

Sinusoidal wavelength-scanning interferometer using an acousto-optic tunable filter with double feedback control for real-time distance measurement

Osami Sasaki, Daiki Matsubara, Takamasa Suzuki

Proceedings Volume 7160, 71600L (2009) https://doi.org/10.1117/12.817855

KEYWORDS: Feedback control, Interferometers, Distance measurement, Control systems, Acousto-optics, Tunable filters, Feedback signals, Mirrors, Time metrology, Signal detection

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Proceedings Article | 3 February 2009 Paper

Interference fringe analysis using wavelet transform

Takamasa Suzuki, Ryo Kiyohara, Mika Ichikawa, Osami Sasaki

Proceedings Volume 7160, 716002 (2009) https://doi.org/10.1117/12.817853

KEYWORDS: Fourier transforms, Fringe analysis, Wavelets, Wavelet transforms, Signal processing, Spatial frequencies, Error analysis, Image acquisition, Interferometry, Interferometers

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Proceedings Article | 26 November 2007 Paper

Multi-period fringe projection interferometry using back-propagation method for shape measurement of glass plate

Hai Huan, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 6829, 68290C (2007) https://doi.org/10.1117/12.768064

KEYWORDS: Glasses, Signal detection, Interferometry, Fringe analysis, Imaging systems, Promethium, Feedback control, Precision measurement, Mirrors, Beam splitters

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Proceedings Article | 26 November 2007 Paper

Phase-shifting laser diode Sagnac interferometer for surface profile measurement

Takamasa Suzuki, Masato Shirai, Osami Sasaki

Proceedings Volume 6829, 68290A (2007) https://doi.org/10.1117/12.756447

KEYWORDS: Sagnac interferometers, Phase shifts, Semiconductor lasers, Modulation, Interferometers, Video, Lenses, CCD cameras, Mirrors, Polarizers

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SPIE Journal Paper | 1 April 2006

Two-dimensional small-rotation-angle measurement using an imaging method

Takamasa Suzuki, Takanori Endo, Osami Sasaki, John Greivenkamp

OE, Vol. 45, Issue 04, 043604, (April 2006) https://doi.org/10.1117/12.10.1117/1.2188945

KEYWORDS: Mirrors, Autocollimators, Fourier transforms, Signal processing, Optical engineering, Metals, Interferometers, Prototyping, Head, Sensors

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SPIE Journal Paper | 1 February 2006

Measurement of sectional profile of V-shaped metal cylinders using a sinusoidally vibrating interference pattern

Jinhuan Li, Osami Sasaki, Takamasa Suzuki

OE, Vol. 45, Issue 02, 023601, (February 2006) https://doi.org/10.1117/12.10.1117/1.2166848

KEYWORDS: Signal detection, Metals, CCD image sensors, Imaging systems, Phase interferometry, Optical engineering, Lithium, Phase measurement, Interferometry, Collimation

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SPIE Journal Paper | 1 January 2006

In-process inspection of surface-profile properties by detecting laser beam deflection

Ryo Shinozaki, Osami Sasaki, Takamasa Suzuki

OE, Vol. 45, Issue 01, 013601, (January 2006) https://doi.org/10.1117/12.10.1117/1.2150821

KEYWORDS: Inspection, Optical proximity correction, Mirrors, Curium, Optical inspection, Sensors, Phase modulation, Optical engineering, Optical testing, Manufacturing

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Proceedings Article | 9 December 2005 Paper

Sinusoidal wavelength-scanning interferometer for measurement of thickness and surface profile of thin films

Hisashi Akiyama, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 6024, 602409 (2005) https://doi.org/10.1117/12.666811

KEYWORDS: Signal detection, Signal processing, Interferometers, Thin films, Modulation, Silica, Glasses, Interferometry, Phase shift keying, Lanthanum

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Proceedings Article | 9 December 2005 Paper

Displacement measurement with a dual-colored sinusoidal phase-modulating interferometer

Takamasa Suzuki, Toshihiko Sato, Osami Sasaki

Proceedings Volume 6024, 60240F (2005) https://doi.org/10.1117/12.666819

KEYWORDS: Interferometry, Modulation, Phase interferometry, Interferometers, Semiconductor lasers, Sensors, Surface plasmons, Mirrors, Scanning probe microscopy, Oscillators

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Proceedings Article | 9 December 2005 Paper

Vibration insensitive interferometer using sinusoidal phase-modulation and feedback control

Osami Sasaki, Hidetaka Iwai, Takamasa Suzuki

Proceedings Volume 6024, 60240N (2005) https://doi.org/10.1117/12.666829

KEYWORDS: Interferometers, Feedback control, Signal detection, Phase interferometry, Semiconducting wafers, Charge-coupled devices, Feedback signals, Modulation, Semiconductor lasers, Atrial fibrillation

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Proceedings Article | 9 December 2005 Paper

Measurement of diameter of metal cylinders using a sinusoidally vibrating interference pattern

Jinhuan Li, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 6024, 60240Q (2005) https://doi.org/10.1117/12.666832

KEYWORDS: Metals, Signal detection, CCD image sensors, Charge-coupled devices, Imaging systems, Mirrors, Phase measurement, Phase interferometry, Beam splitters, Interferometry

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SPIE Journal Paper | 1 December 2005

Sinusoidal phase modulating laser diode interferometer for on-machine surface profile measurement

Xuefeng Zhao, Takamasa Suzuki, Takamasa Masutomi, Osami Sasaki

OE, Vol. 44, Issue 12, 125602, (December 2005) https://doi.org/10.1117/12.10.1117/1.2148447

KEYWORDS: Modulation, Interferometers, CCD cameras, Semiconductor lasers, Charge-coupled devices, Data processing, Feedback control, Phase measurement, Phase shift keying, Signal detection

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SPIE Journal Paper | 1 April 2005

Two-grating interferometer with sinusoidal phase modulation for surface profile measurement

Yande Xu, Osami Sasaki, Takamasa Suzuki

OE, Vol. 44, Issue 04, 043601, (April 2005) https://doi.org/10.1117/12.10.1117/1.1883083

KEYWORDS: Surface finishing, Interferometers, Polishing, CCD image sensors, Signal detection, Interferometry, Imaging systems, Fringe analysis, Phase interferometry, Optical engineering

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Proceedings Article | 20 January 2005 Paper

Measurement of sectional profile of a thread gauge using a sinusoidally vibrating light with sinusoidal intensity

Jinhuan Li, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.576666

KEYWORDS: Signal detection, CCD image sensors, Imaging systems, Image sensors, Mirrors, Collimation, Spatial filters, Phase measurement, Phase interferometry, Interferometry

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Proceedings Article | 20 January 2005 Paper

Interferometric displacement sensors using sinusoidal phase-modulation and optical fibers

Osami Sasaki, Takamasa Suzuki

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.579814

KEYWORDS: Interferometers, Sensors, Optical fibers, Mirrors, Semiconductor lasers, Signal detection, Modulation, Signal processing, Scanning probe microscopy, Superluminescent diodes

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Proceedings Article | 20 January 2005 Paper

Wide-range two-dimensional small rotation-angle measurement by use of fringe projection

Takamasa Suzuki, Takanori Endo, John Greivenkamp, Osami Sasaki

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.580662

KEYWORDS: Autocollimators, Mirrors, Sensors, Metals, Interferometers, Imaging systems, CCD cameras, Prisms, Optical resolution, Signal attenuation

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Proceedings Article | 20 January 2005 Paper

Direct phase modulating laser diode interferometer for in-process measurement using sinusoidal signal synchronized with the CCD camera’s exposure time

Xuefeng Zhao, Takamasa Suzuki, Takamasa Masutomi, Osami Sasaki

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.603826

KEYWORDS: Modulation, CCD cameras, Interferometers, Phase measurement, Semiconductor lasers, Feedback control, Charge-coupled devices, Camera shutters, Phase shift keying, Signal detection

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Proceedings Article | 20 January 2005 Paper

One-dimensional surface profile measurement with a fast scanning method by detecting angular deflection of a laser beam

Ryo Shinozaki, Osami Sasaki, Takamasa Suzuki

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.577647

KEYWORDS: Mirrors, Reflection, Curium, Scanners, Sensors, Aluminum, Phase modulation, Error analysis, Inspection, Vibration isolation

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SPIE Journal Paper | 1 November 2004

Real-time range finder based on phase- and modulation-amplitude-locked laser diode interferometry

Takamasa Suzuki, Tatsuo Iwana, Osami Sasaki

OE, Vol. 43, Issue 11, (November 2004) https://doi.org/10.1117/12.10.1117/1.1799071

KEYWORDS: Phase shift keying, Modulation, Distance measurement, Interferometry, Semiconductor lasers, Feedback control, Control systems, Mirrors, Interferometers, Signal processing

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SPIE Journal Paper | 1 June 2004

Real-time measurement of one-dimensional step profile with a sinusoidal wavelength-scanning interferometer using double feedback control

Osami Sasaki, Kunihiro Honma, Takamasa Suzuki

OE, Vol. 43, Issue 06, (June 2004) https://doi.org/10.1117/12.10.1117/1.1737375

KEYWORDS: Feedback control, Signal detection, Interferometers, CCD image sensors, Feedback signals, Time metrology, Phase interferometry, Phase shift keying, Control systems, Signal processing

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SPIE Journal Paper | 1 March 2004

Sinusoidal phase-modulating laser diode interferometer capable of accelerated operations on four integrating buckets

Xuefeng Zhao, Takamasa Suzuki, Osami Sasaki

OE, Vol. 43, Issue 03, (March 2004) https://doi.org/10.1117/12.10.1117/1.1645252

KEYWORDS: Modulation, Interferometers, Charge-coupled devices, Semiconductor lasers, Phase shift keying, Scanning probe microscopy, Signal generators, Phase interferometry, Phase shifts, Interferometry

Proceedings Article | 26 February 2004 Paper

Stroboscopic step height measurement with two-wavelength interferometer using a single diode laser source

Xuefeng Zhao, Takamasa Suzuki, Osami Sasaki

Proceedings Volume 5265, (2004) https://doi.org/10.1117/12.518642

KEYWORDS: Interferometers, Semiconductor lasers, Laser sources, CCD cameras, Spatial frequencies, Phase interferometry, Fourier transforms, Interferometry, Camera shutters, Control systems

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Proceedings Article | 26 February 2004 Paper

Modulation-amplitude-locked laser diode interferometry for distance measurement

Takamasa Suzuki, Tatsuo Iwana, Osami Sasaki

Proceedings Volume 5265, (2004) https://doi.org/10.1117/12.518640

KEYWORDS: Modulation, Phase shift keying, Distance measurement, Feedback control, Semiconductor lasers, Interferometry, Signal processing, Feedback loops, Interferometers, Control systems

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Proceedings Article | 19 November 2003 Paper

Generation of a ruler marked out every a wavelength by a sinusoidal wavelength-scanning interferometer with double feedback control

Osami Sasaki, Kazuhiro Akiyama, Takamasa Suzuki

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.530947

KEYWORDS: Feedback control, Interferometers, Distance measurement, Control systems, Feedback signals, Signal detection, Mirrors, Lanthanum, Phase modulation, Phase shift keying

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SPIE Journal Paper | 1 July 2003

Optical method for detecting displacement of a car in stereo images

Osami Sasaki, Kenichi Sakata, Takamasa Suzuki

OE, Vol. 42, Issue 07, (July 2003) https://doi.org/10.1117/12.10.1117/1.1577576

KEYWORDS: LCDs, Distance measurement, Binary data, Cameras, Image resolution, Edge detection, Wave propagation, Image processing, Optical engineering, Optical components

SPIE Journal Paper | 1 April 2003

Two-dimensional rotation angle measurement using a sinusoidal phase-modulating laser diode interferometer

Osami Sasaki, Chikao Togashi, Takamasa Suzuki

OE, Vol. 42, Issue 04, (April 2003) https://doi.org/10.1117/12.10.1117/1.1554407

KEYWORDS: Interferometers, Signal detection, Mirrors, Oxygen, Phase interferometry, Semiconductor lasers, Feedback control, Phase measurement, Autocollimators, Interferometry