Abstract: An adhesive system for securing optical elements to a housing or substrate in an aligned position that is maintained over widely varying environmental conditions. A fiber optic device is constructed such that applied adhesive is not disposed between a fiber optic element and the housing of the fiber optic device, but is disposed on longitudinal seams defined by the portion of the element proximal a side of the housing or substrate. In one embodiment, the adhesive has a filler, such as amorphous silica. A method of making includes aligning, applying adhesive, and curing adhesive.

Abstract: An apparatus for directing a light path sequentially between multiple positions. A rotary switch rotates a light beam from a prism relative to a plurality of optical elements arranged radially on a switch body. In one embodiment, a prism rotates in the switch body, causing the light beam to sweep through the optical elements. In another embodiment, the switch body rotates about a prism transmitting the light beam. In various embodiments, the optical elements include a photodetector, a filter and a photodetector pair, a reflector, and a filter and a reflector.