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IEVref:731-03-83ID:
Language:enStatus: Standard
Term: radiation angle
Synonym1: output angle
[Preferred]
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Definition: half the vertex angle of the cone incorporating a specified proportion of the divergent light beam emitted by the end of an optical fibre

NOTE – The cone is usually defined by the angle at which the far-field irradiance has decreased to a specified fraction of its maximum value or as the cone within which can be found a specified fraction of the total radiated power at any point in the far field.


Publication date:1991-10
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