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Updated: Mar 19, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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Published on: July 5, 2016

Checkerboarded spherical phase-based computational optical scanning holography.

Takanori Nomura, Shunsuke Furuya, Yusuke Saita

|March 17, 2026

Summary

This summary is machine-generated.

Computational optical scanning holography (COSH) now captures 3D images faster. A new checkerboarded spherical phase method reduces measurement time by 75% for efficient 3D imaging.

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Area of Science:

Optics and Photonics
Computational Imaging
3D Reconstruction

Background:

Computational optical scanning holography (COSH) is a single-pixel imaging technique for 3D reconstruction.
Conventional COSH uses a four-step phase-shifting method, leading to long measurement times.

Purpose of the Study:

To reduce the measurement time of COSH.
To introduce a novel phase distribution for simultaneous hologram acquisition.

Main Methods:

Proposed a checkerboarded spherical phase distribution combining binary checkerboard and spherical phases.
Utilized multiplexed diffraction to record four phase-shifted holograms simultaneously.
Validated the method through numerical simulations and optical experiments.

Main Results:

Successfully reduced COSH measurement time to one-fourth of conventional methods.
Demonstrated the feasibility of simultaneous four-phase-shift hologram recording.
Confirmed the effectiveness of the proposed method for 3D imaging.

Conclusions:

The checkerboarded spherical phase method significantly accelerates COSH acquisition.
This technique offers a more efficient approach to single-pixel 3D imaging.
The proposed method has potential for various applications requiring fast 3D reconstruction.