A simply structured cavity resonator for a multi-cavity klystron which can position a movable tuning element at a location where the element should be located with respect to a widthwise direction of the element. The cavity resonator of the multi-cavity klystron includes a cavity envelope, and a movable tuning element slidable on upper and lower internal surfaces of the cavity envelope. Each of left and right internal surfaces of the cavity envelope have continuously formed first and second area...

A folded gas laser having improved mirror mounting means in which: (1) optical alignment can be adjusted with two adjustable end mirrors without adjusting a corner block folding mirror assembly; (2) a ceramic corner block provides rigid and accurate support for folding mirrors while permitting direct water cooling of the corner block; (3) an improved mirror mount supports the mirrors in communication with the lasing medium, and (4) an improved orthogonal adjustment is provided for each end mirro...

A klystron cavity is modified to raise its resonant frequency. The central portion of one end wall of the cavity is set back from the other end wall to reduce the capacitance between the central portion and the drift tube projecting from the other wall. A central portion of the other end wall may also be set back if required.

This external cavity laser utilizes an unstable resonator in conjunction with a high reflectivity stripe end mirror which is oriented substantially parallel to the plane of the maximum divergence of the laser diode output beam and whose axis is substantially parallel to the plane of the junction of the laser diode. This configuration operates with high efficiency to select only the fundamental mode of the laser diode with a minimal divergence in the output beam.

A compliant terminal pin for use in electrical connectors for housings or circuit boards and the like which is press fitted into position and is retained in the connector housing, printed circuit board or the like by means of a friction fit. The terminal includes a rigid post at one end and a resilient spring contact structure at the other end thereof. The contact structure and the post are joined by an intermediate section having an aperture therethrough and a lance or tyne extending outwardly ...

A far infrared laser having a CO.sub.2 laser gas cell located in the same optical cavity as the far infrared cell. The CO.sub.2 gas is made to flow through the CO.sub.2 cell within the laser cavity and the far infrared gas is made to flow in the far infrared cell within the laser cavity. The current is supplied between a pair of electrodes in the CO.sub.2 cell to excite the CO.sub.2 gas. The far infrared molecules are pumped by optical energy transfer from the CO.sub.2 laser radiation. The infra...

A fluid-fueled radiant burner having multiple cavities each individually controlled so that selective high, medium and low heat may be achieved, making the burner suitable for use in a cooking range particularly of the flush top type.

In a superconducting cavity resonator, the need to separate the input and output coupling lines from the resonator cavity by the use of vacuumtight microwave windows is avoided by instead having the tubular line(s) for coupling electromagnetic energy into and out of the cavity open into the resonator cavity from below the cavity.

A laser is disclosed with a single, critical surface Brewster window. The Brewster window is formed by a Littrow prism having a first planar surface located along the principal optical axis of the laser and oriented at Brewster's angle with respect thereto, for admitting a refracted, plane polarized component of the laser beam. The Littrow prism has a second substantially planar face which does not require the conventional, high quality "laser polish." This second face intersects the first face ...

A device for examining the inside of a cavity and, more particularly, for viewing or photographing the retina comprising a plurality of optical fibres cooperating with a light source, and an optical system forming an image of the cavity lit by the optical fibres. In this device, the optical fibres are mounted along the generating lines of a frusto-conical support, with their transmitting ends distributed over the smaller base of the support, whereas the lens of the optical system are mounted wit...