Design of refractive optical element producing required irradiance distribution for extended light source
M.A. Moiseev, L.L. Doskolovich

Image Processing Systems Institute of the RAS,
Samara State Aerospace University

Full text of article: Russian language.

Abstract:
A method for design of refractive optical element producing the prescribed irradiance distribution with large angular dimensions from extended light source is presented. The method is based on the gradient optimization of the refractive surface represented as a bicubic spline in spherical coordinates. The optical elements that produce uniform irradiance distribution in the elliptic and rectangular regions for point and extended light sources are computed. The energy efficiency of the optical elements is more than 73 %; the non-uniformity of the generated irradiance distribution is less than 7.5 %. The ratio of the illuminated region size to the thickness of the optical system is about 6.5. This value is twice as large as that for the optical elements presented in available publications.

Key words:
optical element design, uniform irradiance, light-emitting diode, gradient method.

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