Method and apparatus for detecting a coating of a surface by means of induced fluorescence

摘要

The present invention relates to the field of the detection of a coating of a surface (i.e, a check of whether and, if desired, the extent to which at or on a surface, for example, undesired material adheres or lies on), and it proposes a method and a device for detecting a coating of a surface by means of induced fluorescence, the surface to the induction of a fluorescence at least in the surface of an excitation is exposed and a by means of the excitation induced fluorescence - radiation is measured. For inducing of the fluorescence, a first excitation and a second excitation, which differs from the first excitation, is used and / or the fluorescence - radiation is separately in a first and a second radiation - wavelength range is measured, wherein the presence of an occupancy by comparison of at least one measuring - result is determined with a reference.