Spatially incoherent Fourier digital holography by four-step phase-shifting rotational shearing interferometer and its image quality

Watanabe, Kaho; Nomura, Takanori

doi:10.1007/s10043-017-0327-x

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…f o → ∞) yieldswhich is consistent with the previously derived equation based on the coherence function or mutual intensity function 9–11 . Moreover, Eqs (8)–(11) are compatible with a previously reported equation based on a cosine transform and a small-angle approximation 37 .…”

Section: Principle Of Bimodal Incoherent Digital Holographysupporting

confidence: 86%

“…Note that a single dove prism generally reverses a beam and rotates its spatial coordinates, whereas the use of two dove prisms (one in each optical path) eliminates this beam reversal. In previous work, a right-angled prism or a corner cube prism was used instead of the dove prisms to rotate the beam 10,25,37 . However, the ridgeline in prisms leads to a line-shaped artefact in digital holograms.…”

Section: Experimental Demonstrationmentioning

confidence: 99%

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Bimodal Incoherent Digital Holography for Both Three-Dimensional Imaging and Quasi-Infinite–Depth-of-Field Imaging

Nobukawa¹,

Katano²,

Muroi³

et al. 2019

Sci Rep

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Although three-dimensional (3D) imaging and extended depth-of-field (DOF) imaging are completely opposite techniques, both provide much more information about 3D scenes and objects than does traditional two-dimensional imaging. Therefore, these imaging techniques strongly influence a wide variety of applications, such as broadcasting, entertainment, metrology, security and biology. In the present work, we derive a generalised theory involving incoherent digital holography to describe both 3D imaging and quasi-infinite–DOF (QIDOF) imaging, which allows us to comprehensively discuss the functions of each imaging technique. On the basis of this theory, we propose and develop a bimodal incoherent digital holography system that allows both 3D imaging and QIDOF imaging. The proposed system allows imaging objects using spatially incoherent light and reconstructing 3D images or QIDOF images solely by changing the phase pattern of a spatial light modulator and without requiring mechanical adjustments or any other modifications to the setup. As a proof-of-principle experiment, we evaluate the DOF and record holograms of a reflective object with the proposed system. The experimental results show that the generalised theory is effective; our demonstration platform provides the function of 3D and QIDOF imaging.

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Section: Principle Of Bimodal Incoherent Digital Holographysupporting

confidence: 86%

Section: Experimental Demonstrationmentioning

confidence: 99%

Bimodal Incoherent Digital Holography for Both Three-Dimensional Imaging and Quasi-Infinite–Depth-of-Field Imaging

Nobukawa¹,

Katano²,

Muroi³

et al. 2019

Sci Rep

View full text Add to dashboard Cite

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Spatially incoherent Fourier digital holography

Nomura

Watanabe

2017

Three-Dimensional Imaging, Visualization, and Display 2017

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Single-shot in-line Fresnel incoherent holography using a dual-focus checkerboard lens

2020

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Fresnel incoherent correlation holography (FINCH) is a technology that can acquire three-dimensional information of incoherent objects such as fluorescence with an in-line optical system. However, it is difficult to apply FINCH to dynamic phenomena, since FINCH has to detect phase-shifted holograms sequentially to eliminate twin and zero-order images. In this paper, a method in which the phase-shifted holograms can be obtained simultaneously with an in-line setup by using an optimized simulated diffraction optical element (sDOE), realized by a phase-only spatial light modulator, is proposed. The optimized sDOE is an optical device with a dual-focus lens, 2D grating, and spatial phase shifter. Therefore, the sDOE is called a dual-focus checkerboard lens. The optical experiment confirms the feasibility of the proposed method.

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Spatially incoherent Fourier digital holography by four-step phase-shifting rotational shearing interferometer and its image quality

Cited by 7 publications

References 19 publications

Bimodal Incoherent Digital Holography for Both Three-Dimensional Imaging and Quasi-Infinite–Depth-of-Field Imaging

Bimodal Incoherent Digital Holography for Both Three-Dimensional Imaging and Quasi-Infinite–Depth-of-Field Imaging

Spatially incoherent Fourier digital holography

Single-shot in-line Fresnel incoherent holography using a dual-focus checkerboard lens

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