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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

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Published on: August 16, 2012

Two-photon lensless endoscope.

Esben Ravn Andresen, Géraud Bouwmans, Serge Monneret

|October 10, 2013

Summary

This summary is machine-generated.

Researchers demonstrated two-photon endoscopic imaging using a novel lensless endoscope. This technique utilizes fiber optics for excitation and signal collection, enabling advanced imaging capabilities.

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Area of Science:

Biomedical Optics
Microscopy
Fiber Optics

Background:

Traditional endoscopic imaging often relies on bulky optics.
Two-photon microscopy offers enhanced resolution and reduced phototoxicity.
Integrating advanced microscopy techniques into endoscopic probes remains a challenge.

Purpose of the Study:

To demonstrate the first lensless endoscope for two-photon imaging.
To develop a compact imaging probe using fiber optics.
To showcase the feasibility of this approach for biological or material science applications.

Main Methods:

A double-clad fiber bundle served as the endoscope probe.
Femtosecond light pulses were coherently combined for point excitation and scanning.
Back-scattered two-photon signals were collected via the fiber's inner cladding.

Main Results:

Successful demonstration of two-photon endoscopic imaging.
Achieved imaging using a lensless fiber-optic probe.
Validated the system on rhodamine 6G crystals.

Conclusions:

Lensless two-photon endoscopic imaging is feasible.
Fiber-optic based probes offer a compact solution for advanced imaging.
This technology has potential for minimally invasive imaging applications.