| 摘要 |
A nonimaging illumination optical device for producing a selected far field illuminance I output over an angular range, comprising: a source of light having a characteristic irradiance, E; a light reflecting surface having a reflector contour and a family of edge rays defined along a reference line, said reflector contour defined in terms of said reference line by an expression R(t) where t is a scalar parameter position: R(t) = k(t) + Du(t) where k(t) = a parametrization of said reference line; D = a distance from a point on said reference line to said reflecting surface along the desired edge ray through the point; u = unit vector along the desired direction of said edge ray; and said reflector countour reflecting said desired edge ray into actual edge ray a (R(t)), where a is a multidimensional unit vector pointing towards an edge of said source of light, and said D values being the solutions of: a-u) + D (du/dt):a( 7dD = (dk/dt) u 7dt1-a
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