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Tunable liquid crystal multifocal microlens array.

José Francisco Algorri¹, Noureddine Bennis², Virginia Urruchi³

¹Department of Electronic Technology, Carlos III University, Madrid, 28911, Spain. jalgorri@ing.uc3m.es.

Scientific Reports

|December 13, 2017

Summary

This study introduces a novel tunable multifocal liquid crystal microlens array. The device offers high optical power and fill factor, enabling advanced imaging applications with a single voltage control.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Liquid crystal microlens arrays are crucial for advanced optical systems.
Existing designs often lack tunable multifocal capabilities or sufficient optical power.
High fill-factor is desirable for applications like Integral Imaging.

Purpose of the Study:

To propose and demonstrate a novel liquid crystal microlens array with tunable multifocal capability.
To achieve high optical power and fill-factor using a specific hole pattern design.
To enable multiple operating modes with a single voltage control.

Main Methods:

A novel hole pattern design was developed and applied to both substrates of the liquid crystal cell.
Substrates were arranged in a symmetrical configuration.
Experimental demonstration of the tunable multifocal liquid crystal microlens array was performed.

Main Results:

The proposed design achieves tunable multifocal capability with a single voltage control, offering "Off", "Tunable Multifocal", and "Unifocal" modes.
A specific hole pattern design resulted in high optical power compared to conventional structures.
A hexagonal pattern was proposed, yielding a high fill factor suitable for Integral Imaging.
The array demonstrated tunability for resolution, multifocal capability for extended depth of field (DOF), and high fill factor for increased views.

Conclusions:

The demonstrated liquid crystal microlens array offers significant advantages in optical power, fill factor, and tunability.
The device's characteristics are highly suitable for Integral Imaging and other advanced optical applications.
The proposed design has the potential for new applications due to its unique optical properties and low power consumption.