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Optical lens design is the process of designing a lens to meet a set of performance requirements and constraints, including cost and manufacturing limitations. Parameters include surface profile types (spherical, aspheric, holographic, diffractive, etc.), as well as radius of curvature, distance to the next surface, material type and optionally tilt and decenter.
History of optics. Modern ophthalmic lens making machine. Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term ...
A Luneburg lens (original German Lüneburg lens) is a spherically symmetric gradient-index lens. A typical Luneburg lens's refractive index n decreases radially from the center to the outer surface. They can be made for use with electromagnetic radiation from visible light to radio waves . For certain index profiles, the lens will form perfect ...
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Light being refracted by a spherical glass container full of water. Roger Bacon, 13th century. Lens for LSST, a planned sky surveying telescope. The word lens comes from lēns, the Latin name of the lentil (a seed of a lentil plant), because a double-convex lens is lentil-shaped. The lentil also gives its name to a geometric figure.
July 5, 2024 at 10:53 PM. The New York Yankees made a bobblehead for their most beloved (fictional) front office employee. Let's just say it was a hit with fans. With a George Costanza bobblehead ...
On today's episode, Dan Wetzel, Ross Dellenger and SI's Pat Forde discuss the latest buzz coming from Big 12 media day in Las Vegas. They start by reacting to Oklahoma State head coach Mike Gundy ...
July 8, 2024 at 7:27 PM. Rep. Mary Peltola (D-Alaska) will not be in attendance for House votes this week, so she can prepare fish for her family. “This week, Representative Peltola will be in ...