Algorithms for image recovery calculation in extended single-shot phase-shifting digital holography

Hasegawa, Shin; Hirata, Ryo

doi:10.1007/s10043-018-0411-x

Opt Rev

2018

DOI: 10.1007/s10043-018-0411-x

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Algorithms for image recovery calculation in extended single-shot phase-shifting digital holography

Shin Hasegawa

Ryo Hirata

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Cited by 3 publications

References 15 publications

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Whole phase curvature-based particle positioning and size determination by digital holography

Hasegawa

Miaki

2020

Appl. Opt.

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We demonstrate the positioning and characterization of a transparent particle with a diameter of 60 µm in sparse particle fields. Particles appear elongated in optical setups with small numerical apertures that are used in digital holography; thus, an accurate method to position them is required. We propose a new optimization method using the whole phase curvature of a reconstructed wave along the optical axis to obtain not only the precise axial position but also the radius and refractive index of a particle. Experimental results show that the axial positions of particles can be detected with a standard deviation of 38.6 µm, corresponding to 66% of the average particle diameter. A radius of 29.3 ± 0.4 µ m and a refractive index of 1.5910 ± 0.0017 agree well with the manufacturer specifications of particles.

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Whole phase curvature-based particle positioning and size determination by digital holography

Hasegawa

Miaki

2020

Appl. Opt.

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High spatial resolution pixel synthesis structure for full-complex amplitude modulation with twisted nematic LCD

Hasegawa

Inoue

2019

Appl. Opt.

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Machine learning techniques for positioning and characterization of particles in digital holography using the whole phase curvature

Hasegawa¹,

Miaki²

2022

Opt. Continuum

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We propose a machine learning-based regression method with the whole phase curvature of a reconstructed wave along the optical axis as input data to obtain not only the precise axial position but also the radius and refractive index of particles. Experimental results using well-characterized particles showed that an axial position of a particle could be detected, with the mean signed deviation (MSD) and root mean squared error (RMSE) being 0.02% and 85% of the particle’s diameter, respectively. A radius of 29.3 ± 0.36 µm and a refractive index of 1.589 ± 0.002 agreed well with the manufacturer’s specifications. In comparison to our previous nonlinear optimization method, the method was validated for characterizing the distribution of particle characteristics and can be used with a factor of 10,000 faster calculations.

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Algorithms for image recovery calculation in extended single-shot phase-shifting digital holography

Cited by 3 publications

References 15 publications

Whole phase curvature-based particle positioning and size determination by digital holography

Whole phase curvature-based particle positioning and size determination by digital holography

High spatial resolution pixel synthesis structure for full-complex amplitude modulation with twisted nematic LCD

Machine learning techniques for positioning and characterization of particles in digital holography using the whole phase curvature

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