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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 adjustable-focus endoscope with a solid electrically tunable lens.

Yongchao Zou, Wei Zhang, Fook Siong Chau

|September 15, 2015

Summary

This summary is machine-generated.

This study presents a miniature adjustable-focus endoscope featuring a solid tunable lens and piezoelectric benders. The device achieves dynamic optical power tuning for clear imaging at various distances.

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Published on: August 16, 2012

Area of Science:

Biomedical Engineering
Optical Engineering
Materials Science

Background:

Endoscopes require precise focusing for effective medical imaging.
Traditional endoscopes often have fixed focal lengths, limiting their adaptability.
Miniaturization is crucial for minimally invasive procedures.

Purpose of the Study:

To design, fabricate, and characterize a novel miniature adjustable-focus endoscope.
To demonstrate dynamic optical power tuning for enhanced imaging capabilities.
To validate the endoscope's performance in focusing at different object distances.

Main Methods:

Development of a solid tunable lens with freeform surfaces optimized via ray tracing.
Integration of piezoelectric benders for precise lateral lens element movement.
Characterization of optical power tuning range and image resolution.

Main Results:

Experimentally achieved dynamic optical power tuning from 135 to 205 diopters.
No significant image distortion or blurring observed during focus adjustments.
Resolution of approximately 30 line pairs per mm recorded.
Successful focusing on targets at 20 mm, 50 mm, and 150 mm using DC voltage control.

Conclusions:

The developed miniature endoscope offers effective adjustable-focus capability.
The solid tunable lens and piezoelectric actuators provide precise optical control.
This technology holds promise for advanced endoscopic imaging in various medical applications.