Dr. Takeshi Takahashi Profile

Dr. Takeshi Takahashi

at Polytechnic Univ

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Author

Publications (14)

Proceedings Article | 9 June 2006 Paper

Multiple object recognition by digital holography with a wavelength-tuned laser diode

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 6252, 62521M (2006) https://doi.org/10.1117/12.677165

KEYWORDS: Digital holography, Semiconductor lasers, Holograms, Phase shifts, Optical correlators, Phase measurement, Interferometry, Phase shift keying, Object recognition, Interferometers

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Proceedings Article | 7 March 2006 Paper

Laser-diode phase-shifting interferometer applied to joint-transform correlator

Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498391

KEYWORDS: Phase shifts, Optical correlators, Interferometers, Phase measurement, Charge-coupled devices, Fourier transforms, Phase interferometry, Semiconductor lasers, CCD cameras, Mirrors

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Proceedings Article | 20 January 2005 Paper

Wavelength-shifting phase-conjugate interferometry for distance measurements with an external-cavity laser diode

Hisashi Maki, Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.580469

KEYWORDS: Phase conjugation, Interferometers, Distance measurement, Mirrors, Crystals, Reflectivity, Semiconductor lasers, Ferroelectric materials, Modulation, Phase shift keying

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Proceedings Article | 20 January 2005 Paper

Wavelength-shifting interferometry by a wide tunable laser source with a new phase-shifting technique

Masato Higashi, Takeshi Takahashi, Ribun Onodera, Yukihiro Ishii

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.580464

KEYWORDS: Phase shifts, Interferometers, Sapphire lasers, Ferroelectric materials, Phase measurement, Interferometry, Tunable lasers, Light sources, Mirrors, Modulation

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Proceedings Article | 22 October 2004 Paper

Photorefractive optical processing by high-gain two-wave mixing via beam propagation

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 5560, (2004) https://doi.org/10.1117/12.566931

KEYWORDS: Crystals, Two wave mixing, Phase only filters, Laser crystals, Optical correlators, Beam propagation method, Nonlinear crystals, Nonlinear optics, Liquid crystals, Modulators

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Proceedings Article | 19 November 2003 Paper

Three-dimensional range measurement by a wide tunable laser source with fractional fringe techniques

Yukihiro Ishii, Takeshi Takahashi, Ribun Onodera

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.530102

KEYWORDS: Phase shifts, Interferometers, Sapphire lasers, Phase measurement, Tunable lasers, Distance measurement, 3D metrology, Solids, Electronics, Interferometry

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Proceedings Article | 21 October 2003 Paper

Photorefractive spectrum-enhanced processing by two-wave mixing in a phase-only filter

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 5206, (2003) https://doi.org/10.1117/12.508124

KEYWORDS: Crystals, Phase only filters, Ferroelectric materials, Two wave mixing, Laser crystals, Optical correlators, Nonlinear crystals, Optical filters, Image filtering, Electronic filtering

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Proceedings Article | 20 November 2002 Paper

Laser-diode interferometry and phase-conjugate optics

Yukihiro Ishii, Takeshi Takahashi, Ribun Onodera

Proceedings Volume 4803, (2002) https://doi.org/10.1117/12.453585

KEYWORDS: Interferometers, Phase conjugation, Phase shift keying, Mirrors, Laser interferometry, Interferometry, Semiconductor lasers, Laser optics, Crystals, Crystal optics

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Proceedings Article | 16 September 2002 Paper

Phase-shifting joint transform correlator with a wavelength-shifted laser diode

Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483222

KEYWORDS: Phase shifts, Optical correlators, Phase measurement, Semiconductor lasers, Interferometers, Digital holography, Fourier transforms, Charge-coupled devices, Holography, LCDs

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Proceedings Article | 8 May 2001 Paper

Laser-diode joint-transform correlator with a digital interferometric technique

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 4416, (2001) https://doi.org/10.1117/12.427060

KEYWORDS: Optical correlators, Interferometry, Phase measurement, Phase interferometry, Phase shifts, Interferometers, Semiconductor lasers, LCDs, Target detection, Fourier transforms

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Proceedings Article | 19 October 2000 Paper

Laser diode phase-conjugate interferometry with a frequency-modulated continuous-wave technique

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 4110, (2000) https://doi.org/10.1117/12.404765

KEYWORDS: Phase conjugation, Mirrors, Interferometers, Crystals, Reflectivity, Semiconductor lasers, Modulation, Laser crystals, Ferroelectric materials, Distance measurement

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Proceedings Article | 19 July 1999 Paper

Phase-shifting interferometer for distance measurement using a tunable external-cavity laser diode

Yukihiro Ishii, Ribun Onodera, Takeshi Takahashi

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354823

KEYWORDS: Phase shifts, Interferometers, Distance measurement, Semiconductor lasers, Phase measurement, Light sources, Mirrors, Optical testing, Electronics, Interferometry

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Proceedings Article | 7 May 1999 Paper

Spectrum-enhanced correlator by two-wave mixing in a photorefractive crystal

Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 3740, (1999) https://doi.org/10.1117/12.347791

KEYWORDS: Phase only filters, Optical correlators, Two wave mixing, Crystals, Ferroelectric materials, Nonlinear optics, Laser crystals, Optical filters, Nonlinear filtering, Image filtering

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Proceedings Article | 28 August 1995 Paper

Phase-only matched filtering with dual liquid crystal spatial light modulators

Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 2565, (1995) https://doi.org/10.1117/12.217649

KEYWORDS: Phase only filters, Signal to noise ratio, Liquid crystals, Fourier transforms, Optical signal processing, Binary data, Optical correlators, Phase shift keying, Optical filters, Correlation function

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Showing 5 of 14 publications

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