Groundwater pollution investigation or prospecting system for measuring concentrations, flow velocities and their direction, comprises optical fiber and laser with rotating beam system exciting marker

摘要

Electromagnetic radiation is coupled into and/or out from the measurement region (50) at various locations. The groundwater pollution investigation or prospecting system comprises an optical fiber and a laser with rotating beam system exciting marker. Electromagnetic radiation is coupled into and/or out from the measurement region (50) at various locations. An Independent claim is included for the corresponding borehole probe. Preferred Features: Coupling in and/or out is through an optical fiber (80) in the measurement location; the optical fiber being moved by a motor (90). The beam is deflected (using a prism, lens or mirror) through a given, essentially circular path by a rotary unit. The radiation employed is light. The beam includes emission wavelengths of 200-500 nm. The substance measured is excited by the light, which is produced by a laser. The substance is a marker introduced into the borehole.