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

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Published on: July 5, 2016

Functionally integrated waveguide illuminator for common-path digital holographic microscopy through random media.

Kohei Iida, Kenta Hayashi, Maryam Faheem

|June 15, 2023

Summary

This summary is machine-generated.

A novel optical waveguide illuminator enables phase-shift digital holographic microscopy through random media. This compact device simplifies 3D imaging by eliminating bulky components, facilitating microscopy in challenging environments.

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Area of Science:

Optics and Photonics
Microscopy Techniques
Holography

Background:

Digital holographic microscopy (DHM) is a powerful tool for 3D imaging.
Imaging through random media presents significant challenges due to light scattering.
Traditional DHM setups often require bulky optical elements, limiting portability and ease of use.

Purpose of the Study:

To design and fabricate a compact optical waveguide illuminator for common-path digital holographic microscopy.
To enable phase-shift DHM through random media without complex optical components.
To demonstrate the feasibility of 3D microscopic imaging in heterogeneous random media.

Main Methods:

Fabrication of a functionally integrated optical waveguide illuminator.
Generation of two closely spaced point sources with controlled phase shifts.
Implementation of common-path phase-shift digital holography.
Experimental demonstration using a double-composite random medium.

Main Results:

The waveguide illuminator successfully created two point sources satisfying the common-path condition.
The proposed device eliminated the need for a beam splitter, objective lens, and piezoelectric transducer.
High-resolution 3D microscopic imaging through a complex random medium was achieved.

Conclusions:

The developed optical waveguide illuminator is effective for common-path phase-shift DHM.
This technology offers a simplified and compact solution for 3D imaging in scattering environments.
The method holds promise for advanced microscopic analysis of heterogeneous samples.