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A superprism is a photonic crystal in which an entering beam of light will lead to an extremely large angular dispersion.The ability of the photonic crystal to send optical beams with different wavelengths to considerably different angles in space in superprisms has been used to demonstrate wavelength demultiplexing in these structures.
Ignazio Porro Total internal reflection in Porro prism. Ignazio Porro (25 November 1801 – 8 October 1875) was an Italian inventor of optical instruments.. Porro's name is most closely associated with the prism system which he invented around 1850 and which is used in the construction of Porro prism binoculars.
n November 1954, 29-year-old Sammy Davis Jr. was driving to Hollywood when a car crash left his eye mangled beyond repair. Doubting his potential as a one-eyed entertainer, the burgeoning performer sought a solution at the same venerable institution where other misfortunate starlets had gone to fill their vacant sockets: Mager & Gougelman, a family-owned business in New York City that has ...
Prismacolor products include, colored and graphite pencils, soft pastels, erasers, pencil sharpeners, and cases. In past years, Prismacolor also produced watercolor paintings and charcoals . History
The start of Trump’s second term has been marked by a flurry of executive orders aimed at fundamentally reshaping the government and American life.
Roger Pratt, the cinematographer behind “The Fisher King,” “Brazil” and Tim Burton’s “Batman,” has died. He was 77. The news was posted via the British Society of Cinematographers ...
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