Standard light source having restriction portion for diffuse reflection and measurement method
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United States of America Patent
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Jun 28, 2016
Grant Date -
Aug 14, 2014
app pub date -
Jan 23, 2014
filing date -
Feb 14, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A novel standard light source with a more simplified construction, which is suitable for measurement of total luminous flux of a light source different in luminous intensity distribution characteristics from a conventional standard light source, and a measurement method with the use of that standard light source are provided. A standard light source includes a light emitting portion, a power feed portion electrically connected to the light emitting portion, and a restriction portion provided between the light emitting portion and the power feed portion, for restricting propagation of light radiated from the light emitting portion toward the power feed portion. A surface of the restriction portion on which light from the light emitting portion is incident is constructed for diffuse reflection.
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