Patent ID: 8598540
Filing Date: 2013-12-03
Classification: A61B,G01N

Abstract:
1. A system of analysis with the naked eye and by fluorescence of a field in an illuminated area comprising: a first low-remanence white light illumination source formed of an assembly of single-color light-emitting diodes periodically excited at a frequency greater than 24 Hz to provide ambient light; a second light source for exciting fluorescent elements located in said field by emitting an excitation light within the visible range, active at least during part of the time periods when the first source is off, the lighting periods of the first light source being shorter than the lighting periods of the second light source; a fluorescence analysis device active during time periods when the first source is off and the second source is on, wherein the spectrum of the ambient light is complementary to that of the excitation light such that the resultant color of light on the field, as perceived by the naked eye, is the color of the ambient light or a color selected for observation of the field, wherein the analysis device is an electronic camera comprising a line-transfer pixel array, the data collected by the pixels being transferred to memory cells at the excitation frequency of the first source; and a liquid crystal shutter for periodically obscuring the fluorescence analysis device when the first light source is on.