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Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging

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Published on: April 11, 2025

3-D modulable PDMS-based microlens system.

V J Cadarso¹, A Llobera, G Villanueva

¹Institut de Microelectrònica de Barcelona (IMB-CNM-CSIC), Campus UAB 08193 Barcelona, Spain. victor.cadarso@cnm.es

|June 11, 2008

Summary

This summary is machine-generated.

This study presents a 3-D micro-optical system using poly-dimethylsiloxane (PDMS) lenses. Stretching the system creates a tunable focus, transforming a spherical lens into an elliptical one for optical applications.

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Area of Science:

Micro-optics
Materials Science
Optical Engineering

Background:

Micro-optical systems are crucial for miniaturized devices.
Tunable optical components are needed for adaptive optics and photonics.
Poly-dimethylsiloxane (PDMS) offers versatile properties for microfabrication.

Purpose of the Study:

To design, simulate, fabricate, and characterize a 3-D modulable micro-optical system.
To investigate the optical behavior of PDMS lenses under stretching.
To demonstrate a tunable focus mechanism in a micro-optical system.

Main Methods:

Utilized silicon, polymer, and soft-lithography microfabrication techniques.
Designed a system with two uncoupled PDMS lenses of different diameters (2 and 10 microm).
Performed numerical simulations and experimental characterization under stretching conditions.

Main Results:

The smaller PDMS lens (2 microm) remained dimensionally stable under stretching.
The larger PDMS lens (10 microm) transitioned from spherical to elliptical geometry.
Experimental results validated simulations, showing an invariable first focus and a second focus forming a Sturm zone upon stretching.

Conclusions:

The developed 3-D modulable micro-optical system demonstrates tunable focusing capabilities.
The combination of microfabrication techniques enables simple and mass-producible optical microsystems.
This technology holds potential for applications requiring adaptive micro-optical functionalities.