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The most common scanning aperture techniques are the knife-edge technique and the scanning-slit profiler. The former chops the beam with a knife and measures the transmitted power as the blade cuts through the beam. The measured intensity versus knife position yields a curve that is the integrated beam intensity in one direction.
Window screen. A window screen (also known as insect screen, bug screen, fly screen, flywire, wire mesh, or window net) is designed to cover the opening of a window. It is usually a mesh made of metal, fibreglass, plastic wire, or other pieces of plastic and stretched in a frame of wood or metal. It serves to keep leaves, debris, bugs, birds ...
A knife edge at the point source-image location is positioned as to partially block some light from reaching the viewing screen. The illumination of the image is reduced uniformly. A second lens is used to image the test section to the viewing screen. The viewing screen is located a conjugate distance from the plane of the schliere.
Knife Edge Two Piece 1962–65 is an abstract bronze sculpture by Henry Moore. It is one of Moore's earliest sculptures in two pieces, a mode that he started to adopt in 1959. Its form was inspired by the shape of a bone fragment. Moore created the sculpture from an edition of 10 working models in 1962; these working models are now in public ...
The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be defined in many different ways. Five definitions of the beam width are in common use: D4σ, 10/90 or 20/80 knife-edge, 1 ...
Knife Edge is for one to four players. The player, while moving between the locations of the game in the Knife Edge ship, controls a cursor that fires vulcan cannon bullets. When more than one player is playing each cursor is color-coded to distinguish them. As well as the regular gun, there is the option for a secondary weapon.
The Ronchi test is used in the testing of mirrors for reflecting telescopes especially in the field of amateur telescope making. It is much faster to set up than the standard Foucault knife-edge test . The Ronchi test differs from the knife-edge test, requiring a specialized target (the Ronchi grating, which amounts to a periodic series of ...
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