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  1. No Access

    Article

    Two-wavelength digital holography using frequency-modulated continuous-wave technique for multiplexing in the time–frequency domain

    In this study, we have proposed a digital holographic technique in which the frequency-modulated continuous-wave technique is introduced as a novel implementation of wavelength multiplexing in the time–frequen...

    Hikaru Hamada, Masayuki Yokota in Optical Review (2023)

  2. Article

    Preface

    Yusuke Ogura, Nathan Hagen, Yoshio Hayasaki, Jarkko J. Saarinen… in Optical Review (2020)

    Download PDF (259 KB) View Article

  3. No Access

    Article

    Estimation of inner surface profile of a tube by two-wavelength phase-shifting digital holography

    A novel phase-shifting digital holographic method for estimation of inner surface profiles of tubes is proposed. For surface contouring, a two-wavelength method using injection-current-induced wavelength chang...

    Masayuki Yokota, Noriko Ishitobi in Optical Review (2010)

  4. No Access

    Article

    Monitoring of Paint Drying Process by Digital Speckle Correlation

    The state of drying paint is monitored from the dynamic behaviors of the speckle pattern arising from laser illumination of the region inspected. Temporal variation of the peak height of the cross-correlation ...

    Ichirou Yamaguchi, Masayuki Yokota, Takasi Ida, Mizuki Sunaga… in Optical Review (2007)

  5. No Access

    Article

    Analysis of Polarization State by Digital Holography with Polarization Modulation

    The digital holographic technique is applied to analyze the spatial distribution of polarization state of light transmitted through anisotropic objects using an orthogonal linearly polarized reference beam. Th...

    Masayuki Yokota, Yoshitaka Terui, Ichirou Yamaguchi in Optical Review (2006)

  6. No Access

    Chapter and Conference Paper

    Surface Shape Measurement by Dual-wavelength Phase-shifting Digital Holography

    A new method for surface contouring by using digital holography has been proposed and verified by experiments. It takes the difference of the reconstructed phases recorded with two wavelengths separately. The ...

    Ichirou Yamaguchi, Shinji Yamashita, Masayuki Yokota in Fringe 2005 (2006)

  7. No Access

    Article

    Vibration Analysis by Phase Shifting Digital Holography

    Phase-shifting digital holography has been used for the study of vibrating objects. The time-averaged complex amplitude of Fresnel diffracted field due to a vibrating object was obtained by using a three-step ...

    Fucai Zhang, Jesus D. R. Valera, Ichirou Yamaguchi, Masayuki Yokota… in Optical Review (2004)

  8. No Access

    Article

    Polymer-stabilized liquid crystal blue phases

    Blue phases are types of liquid crystal phases that appear in a temperature range between a chiral nematic phase and an isotropic liquid phase. Because blue phases have a three-dimensional cubic structure with...

    Hirotsugu Kikuchi, Masayuki Yokota, Yoshiaki Hisakado, Huai Yang… in Nature Materials (2002)

  9. No Access

    Article

    Portal vein calcification: A clinical review of the last 50 years and report of a case associated with dysplasminogenemia

    We report herein a case of a 68-year-old Japanese woman in whom calcification of the portal vein was recognized by plain abdominal X-ray radiograph and computed tomography (CT) scan when she presented with rep...

    Tomio Kawasaki, Jun-ichi Kambayashi, Masato Sakon, Eiichi Shiba… in Surgery Today (1993)