A fresnel light (pronounced frəˈnel) has a stairsteped lens that varies the spread of the beam. Frenel is named after Augustin-Jean Fresnel, who invented it for use in lighthouses. Focusing a fresnel ...

Researchers have developed a groundbreaking method to produce Fresnel zone plates — paper-thin optical lenses — using standard semiconductor manufacturing techniques. These lenses, though less ...

Researchers have fabricated and tested flat lenses called Fresnel zone plates (FZPs), but did so for the first time using only common semiconductor manufacturing equipment, the i-line stepper ...

Feb. 7, 2025 — An expert in energy technologies uses AI tools to investigate the impact of extreme weather on solar-powered and electrified homes and uncover their unique vulnerabilities and ...

The viewfinder meanwhile uses a lens, a mirror, and a Fresnel lens, and if you think this might look a little familiar it’s because he’s based it upon his previous clip-on viewfinder project.

Welcome to our Independent Lens Brand Book. We’re excited and grateful that you’re here to explore it. With your help, we can keep the Independent Lens brand vital and strong. Now, if you’re ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise.

Learn More › Whether you are outfitting your home in case of an extended power outage or looking for a steady supply of off-grid power for your overlanding setup, it’s never been a better time to ...

Here’s how it works. The best solar lights will keep your backyard or porch lit once the sun goes down. If you enjoy relaxing in the backyard or hosting evening gatherings, solar lights can add ...