Systems and methods for controlling a fluid lens in a data collection device. Further, the present invention is directed to the use of the extract of Ginkgo biloba leaves or isolated GKB in a method for decreasing the proliferation of cancer cells in a patient. For each detection cell the detector further includes insulation means arranged around the third region and extending from the front surface into the first region to an insulation depth comprised between the first depth and the third depth. Further, an error correction circuit can be added to compensate the fluctuations in characteristics of constituent parts.