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Related Experiment Video

Updated: Sep 11, 2025

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass ADG Fresnel Lens for Concentrating Photovoltaics

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass ADG Fresnel Lens for Concentrating Photovoltaics

Published on: October 27, 2017

Adaptive Fresnel lens: basic theory.

Ivan Armstrong, Maik Locher, Johannes Courtial

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|August 12, 2025

Summary

This summary is machine-generated.

We designed an adaptive Fresnel lens with adjustable focal length. Rotating spiral cylindrical lens components allows for dynamic optical control, enabling versatile applications.

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Last Updated: Sep 11, 2025

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Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

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Published on: September 8, 2017

Area of Science:

Optics and Photonics
Optical Engineering

Background:

Traditional fixed-focus lenses limit optical system adaptability.
Adaptive optics are crucial for dynamic light manipulation and advanced imaging.

Purpose of the Study:

To design and validate a novel adaptive Fresnel lens with a tunable focal length.
To explore a mechanical method for achieving continuous focal length adjustment.

Main Methods:

A design utilizing two spirally wound cylindrical lens components with opposing focal lengths.
Mechanical rotation of components to alter the effective optical path and focal length.
Incorporation of Alvarez-Lohmann lens profiles to enhance optical performance.
Raytracing simulations to verify optical behavior and performance.

Main Results:

Demonstrated continuous adjustment of focal length through component rotation.
Raytracing simulations confirmed the lens's adaptive focusing capabilities.
Integration of Alvarez-Lohmann lens profiles significantly improved optical performance metrics.

Conclusions:

The proposed adaptive Fresnel lens design offers a viable solution for dynamic focusing.
The mechanical adjustment mechanism provides a practical approach to tunable optics.
Potential applications in imaging, beam steering, and optical communication systems.