A freeform lens was optimally designed for achieving an uniform illumination and also its tolerance analysis was performed by considering alignement and fabrication errores. Divergent model was chosen for establishing the ray-arriving point relation f...
A freeform lens was optimally designed for achieving an uniform illumination and also its tolerance analysis was performed by considering alignement and fabrication errores. Divergent model was chosen for establishing the ray-arriving point relation for uniform illumination, and the differential equation for the lens shape was numerically solved. The illuminance distribution on the target area was calculated with LightTools™ and the uniformity was extracted from the distribution. From the tolerance analysis, it was confirmed that the alignment error could give harmful effect on the performance.