Fiber-optic multi-wavelength interferometer (MWLI) for the absolute measurement of distances and topologies of surfaces at a large working distance

摘要

The invention relates to a fiber optic designed multi-wavelength optical sensor for the quantitative detection of distance and / or topology of surfaces (105; 202) comprising two or more lasers (101), wherein the wavelengths of the laser (101) in the optical telecommunications range between 1520 nm and 1630 nm in the S, C or L band.