METHOD AND DEVICE FOR DETERMINING A LIGHT TRANSPORT PARAMETER IN A BIOLOGICAL MATRIX

摘要

The invention relates to a method for selectively determining the index of dispersion µs in a biological dispersion matrix, especially for the non-invasive determination of the concentration of glucose in the skin, with the aid of detection measuring, whereby respective light is radiated as a primary light (9) in the biological matrix (5) and measurement occurs for an intensity measuring value of exposed secondary light (12) exiting from a detection point (33-40), which is disposed at various measuring distances (rho) from the respective point of radiation (10) during said detection measurements. In order to improve the quality and selectivity of the determination of µs, the primary light is radiated by means of a contacting light guiding element at an oblique angle of between 5° and 85°. At least two detection measurements of the measuring interval (rho) between the respective radiation point (10) and the respective detection point (33-40) corresponds to a maximum five fold value of the average path length of the propagating light in the biological matrix.