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Related Experiment Video

Updated: May 27, 2026

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Published on: August 29, 2025

Fluorescence intensity ratio stereoscopic transform.

Hoyoung Yun¹, Junggi Min, Hyunwoo Bang

¹School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea.

Journal of Nanoscience and Nanotechnology

|November 30, 2011

Summary

This summary is machine-generated.

A new method called fluorescence intensity ratio stereoscopic transform (FIRST) creates 3-D cell images from 2-D images. This technique enhances visualization of intracellular structures and biomolecular interactions in microfluidic environments.

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Area of Science:

Biophotonics
Cellular Imaging
Microfluidics

Background:

2-D cell imaging lacks depth information.
Visualizing intracellular dynamics requires advanced imaging techniques.
Microfluidic systems offer controlled environments for cell studies.

Purpose of the Study:

To introduce a novel 3-D image processing technique for 2-D cell images.
To develop a method for obtaining clear stereoscopic images from varying fluorescence intensities.
To enable selective detection of biomolecular interactions within cell membranes.

Main Methods:

Developed fluorescence intensity ratio stereoscopic transform (FIRST).
Utilized nonlinear evanescent-field (EF) imaging with on-chip grating couplers.
Manipulated optical pathways for selective illumination in microfluidic channels.

Main Results:

Achieved clear stereoscopic 3-D cell images from 2-D data.
Obtained cell images with adjustable signal-to-background ratio and resolution.
Demonstrated ability to image cell-membrane surface and intracellular structures.

Conclusions:

FIRST provides an intuitive algorithm for 3-D cell image reconstruction.
The method allows controlled detection of optical signals from biomolecular interactions.
This approach facilitates the development of optofluidic sensors for dynamic intracellular molecule studies.