Gelcard illumination enhancement in Gelscope 80 by LED distribution optimization
Marko Me, Andrej Ko · 2009
The paper describes an uneven gel card illumination problem in the gel card image capture device Gelscope 32. The problematic illuminator of the device was analyzed and optimized in such a way, that it illuminated the gel card evenly. Since the illuminator was build using white LEDs, we were able to control the distribution of its luminance by rearranging the LEDs positions. A second order gradient algorithm, implemented in Wolfram Mathematica was used to compute the optimal positions of the LEDs. A minimized objective function was a variation of the illumination produced by a preselected number of LEDs in a general positions. Specific constraints related to the hardware realization were taken into account. The LED distribution obtained was used in the construction of the Gelscope 80 device.