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Like an optical beam, the atomic beam may exhibit diffraction and interference, and can be focused with a Fresnel zone plate [2] or a concave atomic mirror. [3] For comprehensive overviews of atom optics, see the 1994 review by Adams, Sigel, and Mlynek [1] or the 2009 review by Cronin, Jörg, and Pritchard. [4]
AceBeam was founded in 2014 in Shenzhen by Michael Song, a graduate of Beihang University. [4]Over the years, AceBeam has introduced long-distance tactical flashlights, [5] headlamps, [6] [7] everyday carry lights, [8] white laser lights, searchlights, [9] [10] [11] emergency battery-charging flashlights, [12] [13] [14] high-lumen flashlights, [15] and camping lights.
Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy.
ANSI standard FL1 does not specify measurements of the beam width angle but the candela intensity and total lumen ratings can be used by the consumer to assess the beam characteristics. Where two flashlights have similar total light (lumen) measures, the unit with the higher candela rating produces a more concentrated beam of light, suitable ...
A photograph showing two Fulton MX-991/U Flashlights, next to an unofficial reproduction and a standard angle-head flashlight. The MX-991/U Flashlight (aka GI Flashlight, Army flashlight, or Moonbeam [1]) from the TL-122 military flashlight series of 1937-1944 and is a development of the MX-99/U flashlight issued in 1963 [clarification needed].
Atomic beam is special case of particle beam; it is the collimated flux (beam) of neutral atoms. The imaging systems using the slow atomic beams can use the Fresnel zone plate (Fresnel diffraction lens) of a Fresnel diffraction mirror as focusing element. The imaging system with atomic beam could provide the sub-micrometre resolution.
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They produce a well controlled continuous beam spanning up to 100 ms, whereas their predecessor produced only short pulses of atoms. However, this does not constitute a continuous atom laser since the replenishing of the depleted BEC lasts approximately 100 times longer than the duration of the emission itself (i.e. the duty cycle is 1/100).
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