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The Fresnel equations describe the reflection and transmission of light at an interface between different optical media. They were derived by Augustin-Jean Fresnel, who was the first to understand that light is a transverse wave and polarization.
A Fresnel lens is a compact lens that reduces the amount of material required compared to a conventional lens by dividing it into concentric sections. Learn how Augustin-Jean Fresnel invented and improved this lens for use in lighthouses, and how it works with refraction and reflection.
Learn about the life and achievements of Augustin-Jean Fresnel, a French engineer and physicist who developed the wave theory of light and invented the Fresnel lens. The Fresnel lens is a type of optical device that uses a series of concentric rings to focus light over a wide angle.
Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.
Learn about the different types of optical prisms, such as dispersive, reflective, beam-splitting and polarizing prisms, and how they refract, reflect or split light. Find out how prisms are made of transparent materials like glass, acrylic or fluorite, and how they can create spectra, images or polarizations.
A Fresnel rhomb is an optical prism that introduces a 90° phase difference between two perpendicular components of polarization, by means of two total internal reflections. Learn about its operation, history, and applications in polarization experiments and devices.
A polarizer is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. Learn about linear polarizers, circular polarizers, absorptive polarizers, beam-splitting polarizers and polarization by Fresnel reflection.
A burning glass is a large convex lens that can focus sunlight and ignite materials. Learn about its origins, applications in science, war, religion and emergency situations, and see some illustrations and references.
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