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 ...

Diffractive lenses, such as Fresnel plates, offer a lightweight alternative but suffer from color distortion issues. These limitations have long hindered their adoption in astrophotography.

ORAFOL Fresnel Optics GmbH offers custom fabrication of plastic micro- and nanostructured optical components. Based on the complete chain of optical design, tool fabrication, precision polymer ...

Pronounced "fraynel zone." The pattern of electromagnetic radiation that is created by a transmitting station from its antenna to receiving antennas. It is in the shape of an ellipsoid, or 3D ...

Fresnel lenses are all around us, but this vase puts the commonplace technology to work in an entirely new way. Borrowed From Old Lighthouses, A Method For Super-Powerful Solar Power With the help ...