Making a glass Fresnel lens with its concentric rings requires even more work, but as the ever-resourceful [Robert Murray-Smith] shows us, a Fresnel lens can be made from far more mundane materials.

Fresnel lenses are specialized optical components with grooved surfaces instead of traditional curved ones. Owing to their unique design, Fresnel lenses are thin and lightweight, typically have short ...

Speaking of lenses, the Meta Quest 3S reverts to fresnel lenses. The Quest 3’s “pancake lenses” help make graphics in your ...

If you are a Hackaday reader, you probably know what a Fresnel lens is. You find them in everything from overhead projectors to VR headsets. While it seems commonplace now, the Fresnel lens was an ...

Do most individuals die young or live to ripe old ages? Survivorship curves visually answer these demographic questions. Imagine a population of 1,000 individuals born at the same time in the same ...

For centuries meandering rivers have been straightened – but experts say restoring their natural bends and curves can prevent flooding and create healthy habitats for wildlife. Swindale Beck ...

That market is big — worth about $27 trillion. It’s also been flashing red for more than a year because of its “inverted yield curve.” The yield curve was identified as a recession ...

The Meta Quest 3S goes on sale on October 15. The base model costs $299 and comes with 128GB of storage, while the 256GB ...

The yield curve righted itself Wednesday after more than two years of a negative spread between the 10- and 2-year Treasury yields. However, the measure inverted again on Thursday. An inverted ...

The event – commonly dubbed a yield curve inversion – was largely viewed as a signal the U.S. economy would likely slip into recession in the near future. An inverted yield curve occurs when ...

The longest inverted yield curve on record may finally be in the rearview mirror. The yield on the 2-year note closed at 3.651%, according to Tradeweb, lower than the 10-year yield, which settled ...

Meta unveiled the Quest 3S at its September 25 Meta Connect event. There are two Meta Quest 3S models, and the only ...