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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
Target Optical was founded by the Cole National Corporation in 1995 [ 1] in Cleveland, Ohio. In 2004, the Cole National Corporation was acquired by the Italian Luxottica S.p.A. along with other Cole National Corporation holdings such as Pearle Vision. Luxottica folded Cole's operations into its North American Retail Group and the Cole structure ...
Negative-index metamaterial. A negative-index metamaterial causes light to refract, or bend, differently than in more common positive-index materials such as glass lenses. Negative-index metamaterial or negative-index material ( NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value over some frequency ...
Harry Albert Atwater, Jr. [1] is an American physicist and materials scientist and is the Otis Booth Leadership Chair of the division of engineering and applied science at the California Institute of Technology. Currently he is the Howard Hughes Professor of Applied Physics and Materials Science and the director for the Liquid Sunlight Alliance ...
Unertl Optical Company, Inc. was a manufacturer of telescopic sights in the United States from 1928 until 2008. They are known for their 10× fixed-power scopes that were used on the Marine Corps ' M40 rifle and made famous by Marine Corps Scout Sniper Carlos Hathcock during the Vietnam War .
A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. [ 1] It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim.
July 30, 2024 at 11:13 AM. Andrew Kuhn/akuhn@mercedsun-star.com. Atwater Police Chief Michael Salvador announced he will be retiring from the position later this year, according to the City of ...
A plasmonic metamaterial is a metamaterial that uses surface plasmons to achieve optical properties not seen in nature. Plasmons are produced from the interaction of light with metal- dielectric materials. Under specific conditions, the incident light couples with the surface plasmons to create self-sustaining, propagating electromagnetic waves ...
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