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Related Experiment Video

Updated: May 13, 2026

High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging

High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging

Published on: January 11, 2011

Miniature grating for spectrally-encoded endoscopy.

Dongkyun Kang¹, Ramses V Martinez, George M Whitesides

¹Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA.

|March 19, 2013

Summary

This summary is machine-generated.

Researchers developed a new fabrication method for spectrally-encoded endoscopy (SEE) probes. This cost-effective soft lithography technique enables sub-millimeter SEE probes for high-definition medical imaging.

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Last Updated: May 13, 2026

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Area of Science:

Biomedical Engineering
Optical Imaging
Medical Device Fabrication

Background:

Spectrally-encoded endoscopy (SEE) offers ultraminiature, high-definition imaging via sub-millimeter probes.
Previous SEE probe fabrication challenges, particularly miniature grating production, have limited clinical translation.
SEE technology encodes one transverse dimension with wavelength, enabling line-by-line imaging without beam scanning.

Purpose of the Study:

To introduce a novel, cost-effective fabrication method for spectrally-encoded endoscopy (SEE) probes.
To overcome limitations in producing the essential miniature gratings for SEE devices.
To facilitate the clinical translation of SEE technology through improved fabrication.

Main Methods:

A soft lithography approach was employed to pattern a high-aspect-ratio grating.
The grating was integrated onto the tip of miniature imaging optics.
A 500 μm-diameter SEE probe was successfully constructed using this technique.

Main Results:

The fabricated miniature grating achieved a measured diffraction efficiency of 75%.
The new SEE probe visualized key anatomical features in a human finger and mouse embryos with high contrast.
The soft lithography method proved to be cost-effective and reliable for probe fabrication.

Conclusions:

A novel soft lithography method enables efficient and reliable fabrication of sub-millimeter SEE probes.
The developed SEE probe demonstrates high-quality imaging capabilities for biological tissues.
This advancement is expected to accelerate the clinical adoption of spectrally-encoded endoscopy.