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 ...

Yabe needed to find ways of improving the efficiency and output power of solar-pumped lasers, which are normally very low-power. Yabe's first innovation was to use a Fresnel lens to collect and ...

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 ...