Calculation of Direct Illuminance
※Case:Spherical Surface Shaped Light Source.

Keyword

Direct Illuminance,Spherical Surface Shaped Light Source,Luminous intensity.

Reference

[1]:『照明ハンドブック第２版』(社団法人照明学会).

Remarks

・Eq=π*I*r^2/h^2.
・Ep=π*I*r^2*h/(h^2+d^2)^(3/2).
・d:The distance of "P" to "Q".
・Fig1:Reference[1].

History

・2014/08/01：Layout change.
・2009/11/08：Upload.