去年国际
光学设计的
照明问题。
,R*ru* 转载自：
http://iodc.info/illumination-design-problem/39-problems/58-2010-illumination-design-problem }U+gJkY2 有兴趣的同好可以看看。光行坛有人参加吗？
QJ pUk%Wj Dth<hS,2J Problem description:
0nA17^W ae#7*B Transfer maximum monochromatic flux from a 1-mm-square Lambertian source in air to an equal-etendue nonimmersed target. The target surface is rectangular with a 16:9 aspect ratio. The surface area of the target must be at least 4 mm². The target is defined such that only rays incident on the target surface at angles of θmax or less, relative to the surface normal, are considered to be within the phase space of the target, where the value of θmax is determined by the equal-étendue requirement.
`@=}5 9+| [ nY w J Problem design degrees of freedom:
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GJO[ Can be any combination of idealized refractive and reflective components.
m.S@ e8kS & 87 D.Yy^ Assumptions and constraints
'{U56^b] The only media allowed are air (index of 1) or dielectrics with refractive index in the range 1.33 - 1.59.
&~ ^"yo#b E%j OJA The coupling efficiency will be computed in the geometrical optics approximation using 100,000 pseudo-randomly generated rays. Optical losses produced by the following material characteristics will be included in the efficiency computation:
vZ$uD,@;. USe"1(|E Mirror reflectivity = 95% at all angles.
Y@RPQPmIQ TIR reflectivity = 100% at all angles.
D='/-3f!F] Bulk absorption loss for all dielectric materials = 0.5% per cm.
B 2&fvv? Fresnel losses at air-dielectric interfaces = 2% at all angles.
jw# 'f% * Fresnel losses between two different dielectric interfaces = 0.2% at all angles.
jlzqa7 No Fresnel losses within a gradient index material.
Alh%Z\ Minimum size of a component and edge thickness = 0.1 mm.
w.J2pvyB Minimum air space between components (including source) = 0.1 mm
~D<o}ItRF No volume or surface scattering.
S1 %{/w Light that finds its way back into the source is fully absorbed.
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