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The history of optics began long before Christ in the regions where ancient Egyptians and Mesopotamians used to live. The Indian subcontinent, the Greek people, and the Islamic world should be ...

The most important thing to know about Fresnel lenses, before casually attempting to drop them into conversation, has to do with phonetics: "Fresnel" is pronounced "Fruh-NEL." If the silent "S" makes ...

Try on an Oculus Rift or HTC Vive and one of the first things you’ll probably notice looking through the lenses are fine concentric circles, creating something many call ‘God Rays’—especially ...

Dr. Filip Sosnicki with a standard spatial Fresnel lens. Its temporal analogue was used in the conducted research (photo: Mirosław Kazmierczak, source: University of Warsaw). It is permissable to make ...

You may know them best for their original use in lighthouses, where they're famously recognised as "the invention that saved a million ships". Or perhaps you initially think of their employment in ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In the early nineteenth century, ...