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pencil beam

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
A searchlight beam reduced to, or set at, its minimum width.


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The satellite contains eight bands of the OCM to study ocean biology, Ku band pencil beam, Scatterometer to measure sea surface wind vectors and radio occultation sounder for atmosphere.
A laser emits its light in a concentrated pencil beam typically a millimetre or so across.
In Line Describing a Cone (1973) a single pencil beam is projected on to a wall and then mist is introduced to cause the beam to appear solid.
 
 
 
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