A lens assembly includes, in order from an object side toward an image side along an optical axis thereof, a first lens having positive refractive power, and a second lens. The turf layer extends a certain distance beyond the base to cover a ground surface adjacent to that on which the base is placed to rest. Such applications includes inductors or traveling wave tubes fabricated from a method for fabricating nanocoils with a desired pitch. An electronics assembly comprises:. The stepped cooling block allows the fabrication of a close packed and compact assembly in which individual laser diode subassembly output beams do not interfere with one another. In particular, the orthopedic implant comprises an elongate, substantially cylindrical base body, which can be inserted into patients using minimally invasive treatment together with little trauma to the surrounding tissue.