| 摘要 |
The invention relates to an optical analysis method for distinguishing a substance (2) present on a substrate such as an object or a document, wherein said method includes the step (a) of illuminating said substrate with a primary light beam selected in order to interact with the substance (2) so that the latter transmits, within a secondary light beam in the visible spectrum, a characteristic chromatic radiation that is not directly detectable in the secondary light beam, and a detection step (b) that comprises a selective filtration sub-step (b1) during which the secondary light beam is filtered through a spectral window of the visible spectrum adapted to said characteristic chromatic radiation in order to detect the substance (2) from the environment thereof. The invention can be used for the optical analysis of documents. |
