Patent ID: 6714297
Filing Date: 2004-03-30
Classification: G01N,G02B

Abstract:
Optical arrangement for detecting light emitted by a sample, having one or more optical waveguides which possess a first end face, a shell surface, and a second end face, with the sample being arranged in a sample medium in front of the first end face, and the one or more optical waveguide bodies consisting of a material that has a higher refractive index than the sample medium for the light emitted;characterized in that the first end face is flat, at least in a region near the sample; the first end face forms an interface, or is optically coupled to an interface between the sample medium and a medium located in front of the first end face that has a higher refractive index than the sample medium, so that essentially the entire light emitted by the sample and radiated through the interface into a half-space facing the first end face, including evanescently radiated light, i.e. light radiated into the half-space above the angle of total internal reflection, enters the optical waveguide body through the first end face; and the shell surface and the second end face are arranged and constructed in such a way that essentially the entire evanescently radiated light radiated into the optical waveguide is totally internally reflected at the shell surface back into the optical waveguide, guided through the second end face, and directed onto a detection device.