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 ...

Making a traditional glass lens requires a lot of experience, skill, and patience grinding a piece of glass to the required shape, and is not for the casual experimenter. Making a glass Fresnel ...

Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

A progressive lens design is like a bi- or tri-focal lens in that it corrects more than one vision problem at a time. However, these lenses have no visible lines, improving the cosmetic appearance of ...

It towers above the museum's displays of ship models and marine artifacts. This is the Fresnel lens, not one lens really, but numerous tiers of prisms. Lenses like this one turned simple flames ...

There are two basic types of telescope ... The use of concentric rings on a flat lens isn't new — a precursor, called a Fresnel zone plate, tries to do the same trick but is unable to eradicate ...

One of the most interesting bits of information relates to the lens: according to Sony it's a Fresnel lens. That's quite a big deal, because it affects how well you'll see the PSVR 2 display.