Abstract: An apparatus adapted to measure gaseous hydrogen concentrations in a mechanical vacuum pump (MVP) gas stream includes connection ports adapted to allow the apparatus to be connected to an MVP system and allow a gas stream sample to be taken from the MVP gas stream. The apparatus further includes a hydrogen concentration analyzer to measure H2 concentrations of the gas stream sample taken from the MVP gas stream.

Abstract: An apparatus adapted to measure gaseous hydrogen concentrations in a mechanical vacuum pump (MVP) gas stream includes connection ports adapted to allow the apparatus to be connected to an MVP system and allow a gas stream sample to be taken from the MVP gas stream. The apparatus further includes a hydrogen concentration analyzer to measure H2 concentrations of the gas stream sample taken from the MVP gas stream.

Abstract: A sighted device has a sight that includes an objective lens lying on an optical axis of the sight so that an input beam is coincident with the optical axis, an eyepiece lens lying on the optical axis, an imaging detector having a detector output signal, a signal processor that receives the detector output signal from the imaging detector, modifies the detector output signal, and has a processor output signal, and a video display projector that receives the processor output signal and has a video display projector output. An optical beam splitter lies on the optical axis. The beam splitter allows a first split subbeam of the input beam to pass to the eyepiece lens and reflects a second split subbeam of the input beam to the imaging detector. An optical mixer mixes the first split subbeam and the video display projector output prior to the first split subbeam passing through the eyepiece lens.

Abstract: An optical component measurement system including a holding fixture adapted to hold a plurality of optical components in an array; and an optical detector movably connected to the holding fixture. The detector is movable between a front side of the holding fixture and an opposite rear side of the holding fixture for taking measurements from more than one side of the optical components in the array.

Abstract: A multiplexing device includes two facing-but-spaced apart optical transmitting plates, with optical reflective filters in facing contact with outer surfaces of the optical transmitting plates to define a reflective beam path therebetween. Light transceivers are associated with each of the optical reflective filters. The optical transmitting plates have greater indices of refraction than the central medium between them, so that the beam path has a low angle of incidence to the optical reflective filters but a higher angle in the central medium.

Abstract: A cylindrical article is positioned relative to a support surface by supporting the cylindrical article from a first pair of ball bearings contacting the cylindrical article adjacent to its first end, and a second pair of ball bearings contacting the cylindrical surface adjacent to its second end. At least one of the ball bearings is moved relative to the cylindrical article to reposition the cylindrical article. The repositioning may be performed under feedback control of actuators that move the ball bearings. The article may be fixed relative to the support surface after it is properly positioned.