Methods and assembly for illuminating a surface of an aircraft passenger cabin
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United States of America Patent
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Jul 17, 2018
Grant Date -
Jun 4, 2015
app pub date -
Feb 3, 2014
filing date -
Dec 4, 2013
priority date (Note) -
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Abstract
A method of making a light guide for an aircraft passenger cabin is provided. The method includes determining, for each of a plurality of points on an interior surface of the cabin, a corresponding fixture angle from a light fixture receptacle, a distance, and an angle of incidence at the point. The method also includes calculating an incident light intensity for each of the plurality of points, assuming a light source that emits light of uniform intensity at each fixture angle. Additionally, the method includes calculating a relative ray strength from each fixture angle needed to produce a desired incident light intensity at each corresponding point, and disposing a plurality of light extraction features on a unit length of the light guide such that at least one of a number and a size of the light extraction features are determined based on the relative ray strength for that fixture angle.
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