Abstract: In accordance with the invention, an optical waveguide device having a polished polymer end facet for low loss optical coupling is made by the steps of providing a polymer optical waveguide workpiece comprising a substrate and an overlying waveguiding structure formed of one or more layers of polymer softer than the material of the substrate. A cover layer of a material harder than the polymer is then secured overlying the polymer layers, and one or more polymer end facets are polished. The cover layer and the substrate guide the polishing so that the resulting facets have a flat, smooth surface.

Abstract: A magnetic coupling member for a magnet assembly of a pipeline inspection vehicle comprising one or more stacks of foils arranged as multi-layer laminations interleaved with short spacers and clamped together between clamping blocks by bolts. The assembly of clamped-together stack of foils is secured to the magnet of the vehicle magnet assembly by removable bolts which enable easy replacement of worn or damaged stacks of foils.