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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.
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.
A Fresnel lens is a type of lens that reduces the amount of material required compared to a conventional lens by dividing it into concentric sections. Learn about its invention by Augustin-Jean Fresnel for lighthouses, its different types and applications in illumination, imaging and solar power.
Learn about glasses, also known as eyeglasses and spectacles, which are vision eyewear with clear or tinted lenses mounted in a frame. Find out about corrective, safety, sunglasses and other types of glasses, as well as their history and evolution.
Learn about binoculars or field glasses, two refracting telescopes aligned to point in the same direction, allowing binocular vision. Compare different optical designs, such as Galilean, Keplerian, Porro and roof prism, and their advantages and disadvantages.
Which are the most expensive glasses in the world? The title of most expensive sunglasses in the world goes to the Chopard de Rigo Vision, which are priced at $408,000. These stunning specs are ...