This AbVideo demonstrates the operation of automated interferometric inspection system specifically designed for checking the surface quality and flatness of cleaved, polished or lensed fibers. Optical fibers are flexible, transparent fibers made of high quality extruded glass (silica) or plastic. It is frequently adopted as a waveguide, or "light pipe", to transmit the optical signals. Taking advantages of this kind of property, optical fibers have been used in developing biological sensors in concert with traditional bio-probes such as nucleic acids.