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Related Experiment Video

Updated: Oct 12, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

Single-shot multiple-depth macroscopic imaging by spatial frequency multiplexing.

Munkyu Kang, Sungsoo Woo, Wonjun Choi

|November 23, 2021

Summary

This summary is machine-generated.

This study introduces a novel 3D imaging system using low-coherence interferometry. It enables rapid, non-contact 3D imaging of macroscopic objects through narrow spaces without mechanical scanning.

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Area of Science:

Optical Engineering
Biomedical Imaging
Metrology

Background:

Traditional 3D imaging systems often require mechanical scanning, limiting speed and accessibility for macroscopic objects.
Imaging through narrow passages presents challenges for conventional optical setups.
Low-coherence interferometry offers depth-resolved imaging capabilities.

Purpose of the Study:

To develop a 3D imaging system for macroscopic objects via narrow passages.
To eliminate mechanical depth scanning for faster image acquisition.
To enhance imaging speed and depth coverage in interferometric microscopy.

Main Methods:

A probe-type low-coherence interferometric system with fiber optic imaging and illumination.
Spatial frequency multiplexing using a 2D diffraction grating and echelon in the reference arm.
Encoding multiple depth planes into a single interferogram without mechanical scanning.

Main Results:

Successful acquisition of 9 depth images at 250 μm intervals.
Demonstrated 3D imaging of a cone and a plaster teeth model.
Significant reduction in mechanical scanning requirements.

Conclusions:

The proposed system enables rapid 3D imaging of macroscopic objects through confined spaces.
Spatial frequency multiplexing effectively replaces mechanical depth scanning.
The system offers a promising solution for high-speed, non-contact 3D metrology.