Abstract: A body is configured for alignment to a substrate having an alignment feature. The body includes an alignment structure defining a viewing surface, and a dedicated lens adapted to focus an image of the substrate's alignment feature through an optically-clear material of the body and onto the viewing surface. In the fiber optic context, a lens body is provided for optically coupling a substrate's OED to a corresponding optical fiber. The lens body further includes at least one active lens adapted to cooperate optically with a respective OED. The dedicated lens is positioned externally to any optical path. An optical subassembly includes a substrate having at least one perceptible alignment feature provided in a predetermined spatial relationship to the OED, and a lens body secured to the substrate such that the image of the substrate's alignment feature appears aligned relative to the viewing surface.

Abstract: A body is configured for alignment to a substrate having an alignment feature. The body includes an alignment structure defining a viewing surface, and a dedicated lens adapted to focus an image of the substrate's alignment feature through an optically-clear material of the body and onto the viewing surface. In the fiber optic context, a lens body is provided for optically coupling a substrate's OED to a corresponding optical fiber. The lens body further includes at least one active lens adapted to cooperate optically with a respective OED. The dedicated lens is positioned externally to any optical path. An optical subassembly includes a substrate having at least one perceptible alignment feature provided in a predetermined spatial relationship to the OED, and a lens body secured to the substrate such that the image of the substrate's alignment feature appears aligned relative to the viewing surface.

Abstract: A polyolefin elastomer possessing a unique combination of properties, i.e., high molecular weight (Mw), high Mooney viscosity (ML1+4 at 125° C.), low polydispersity index (Mw/Mn) and low glass transition temperature (Tg), is obtained by a polymerization process employing a particular type of a metallocene catalyst. The polyolefin elastomer is useful for manufacturing a variety of products including rubber articles such as hoses, belts and moldings, polymer blends containing one or more other hydrocarbon polymers and lubricating oils in which the elastomer functions as a viscosity modifier. Also disclosed is a cocatalyst for activating the metallocene procatalyst employing a specific molar ratio of the components of the cocatalyst to the transition metal of the procatalyst.