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Updated: May 14, 2026

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

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

Published on: August 16, 2012

Zoom lens design using liquid lens for laparoscope.

Seungwan Lee¹, Minseog Choi, Eunsung Lee

¹Micro Systems Lab., Samsung Advanced Institute of Technology, Nongseo-dong, Giheung-gu, Yongin-si, Gyeonggido 446-712, South Korea. lswan@samsung.com

|February 8, 2013

Summary

This study introduces a new liquid lens optical design for laparoscopes, enabling variable magnification from 1x to 4x. This innovation improves tissue visualization during minimally invasive surgery.

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Application of Laparoscopic Ultrasonography in Primary Choledochal Suture during Combined Two-lens Surgery

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Area of Science:

Medical Imaging
Optical Engineering
Minimally Invasive Surgery

Background:

Traditional laparoscopic systems offer limited optical magnification, requiring manual adjustments or external adapters for enhanced visualization.
Current laparoscopes often necessitate swapping devices or using cumbersome adapters to achieve higher magnifications, disrupting surgical workflow.

Purpose of the Study:

To develop an advanced optical design for laparoscopes utilizing liquid lenses to achieve variable zoom capabilities.
To enhance tissue magnification during surgical procedures by integrating adjustable liquid lenses within the optical system.

Main Methods:

The study designed a laparoscope incorporating two liquid lenses with variable focal lengths, allowing for seamless zooming.
The optical design was optimized to change the sag of liquid lenses for magnifications of 1x, 2x, and 4x.
A pair of laparoscopes for 3-D stereoscopy was integrated into an 11 mm diameter tube.

Main Results:

The proposed optical design successfully integrates liquid lenses for variable zoom functionality in laparoscopes.
The system achieves magnifications of 1x, 2x, and 4x by adjusting the liquid lens sag.
A predicted depth resolution of 0.5 mm at 4x zoom was achieved without interpolation, enhancing surgical precision.

Conclusions:

The developed liquid lens optical design offers a significant advancement for laparoscopic surgery by providing variable magnification.
This technology improves the ability to visualize and resolve tissue details at higher zoom levels, potentially leading to better surgical outcomes.
The compact design within an 11 mm tube makes it suitable for integration into existing laparoscopic instruments.