Metasurface doublet lens has a sharp 60° × 60° field of view

Dec. 28, 2016
f/0.9 flat lens is corrected for monochromatic aberrations at 850 nm.

Engineers at Caltech (Pasadena, CA) have developed flat optical doublet lenses that can be easily mass-produced and integrated with image sensors, paving the way for cheaper and lighter cameras in electronic devices.1

The technology relies on stacking two metasurfaces. In this case, the metasurfaces are dotted with silicon cylinders 600 nm tall and with varying diameters in the hundreds of nanometers. Each metasurface has tens of millions of these posts. The resulting f/0.9 lens is corrected for monochromatic aberrations at 850 nm and has an efficiency of 70%.

Depending on their structure, metasurface singlets often have aberrations that include field curvature; as in traditional glass doublets, these aberrations can be compensated in a metasurface doublet design, especially when a monochromatic design is used.

The Caltech team plans to integrate these lenses into miniaturized cameras and microscopes, and extend their functionality and spectral bandwidth.

Source: https://www.caltech.edu/news/future-flat-lenses-53375

REFERENCE:

1. Amir Arbabi et al., Nature Communications (2106); doi: 10.1038/ncomms13682

About the Author

John Wallace | Senior Technical Editor (1998-2022)

John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.

Sponsored Recommendations

Request a quote: Micro 3D Printed Part or microArch micro-precision 3D printers

April 11, 2024
See the results for yourself! We'll print a benchmark part so that you can assess our quality. Just send us your file and we'll get to work.

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

Precision Motion Control for Sample Manipulation in Ultra-High Resolution Tomography

April 10, 2024
Learn the critical items that designers and engineers must consider when attempting to achieve reliable ultra-high resolution tomography results here!

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!