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beam width
(redirected from Beam diameter)

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
The angle between the directions, on either side of the axis, at which the intensity of the radio frequency field drops to one-half the value it has on the axis.


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Floodlighting RLLD commercial exterior floodlights feature superior beam adjustment controls that can precisely control beam diameter and directional placement.
Power mode" is when the beam diameter is less than the defining aperture of the TSI instrument (or NIST irradiance standard); "irradiance mode" is when the input beam diameter is greater than the diameter of the defining aperture.
 
 
 
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