IEVref:845-27-076ID:
Language:enStatus: Standard
Term: optical beam axis
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Definition: axis about which the luminous intensity distribution is substantially symmetrical

Note 1 to entry: The optical beam axis is not necessarily the same as the lamp axis through the lamp cap or the lamp axis normal to a reference plane. The following figure illustrates the relation between the optical beam axis, the mechanical/geometrical axis, the peak intensity and the centre beam intensity.

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Publication date:2020-12
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