(免費下載) CIE發布最新出版品CIE TN 010:2019 – The Use of “Determination of the Optical Beam Axis, Centre Beam Intensity, and Beam Angle of Directional Light Sources

Many regional standards and regulations require a manufacturer of directional light sources to publish the beam angle (or beam angles for non-symmetrical sources) and centre beam luminous intensity of their products as well as derived data such as the useful luminous flux or zonal lumen values. However, these data are calculated from the optical beam axis and therefore their determination requires a precise, repeatable and unambiguous method of identifying the optical beam axis of a light source.[more]  

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