Abstract: A night vision goggle system comprising a housing, an optical system accommodated therein and including a pair of eyepiece assemblies, with each assembly slidably mounted for interpupillary adjustment. The assemblies are respectively focusable. The optical system further includes an objective lens assembly, an image intensifier tube provided with concave-faced fiber optics, and a collimator lens assembly, all in axial alignment, and a splitter member. The objective, collimator and eyepiece assemblies feature prescription optics.The goggle system preferably is head mounted via a quick-release connection to a face mask provided with an adjustable strap assembly.

Abstract: The method and device of the instant invention is a detector of pulsed laser radiation which utilizes the electromotive force generated by the plasma formed when such radiation is focused onto a surface (1). Measurements are made with a 10.6 .mu.m CO.sub.2 laser capable of producing peak intensities of 10.sup.13 W/cm.sup.2 when directed through a converging lens (2). Evacuated detector response to such laser intensity is 1 kV signal peak amplitude and subnanosecond risetimes into a 50.OMEGA. load (3). Detector performance is found to be greatly altered with the introduction of a background gas (4). For example, with one atmosphere of air, the detector produces prompt signals of the order of 1 V with subnanosecond response for pulse trains lasting 100 ns. With argon, krypton, or zenon at pressures of the order of 10 torr, the detector generates "trigger pulses" of about 250 V amplitude and 0.2 ns risetimes.

Abstract: An electron tube which comprises a metal vacuum envelope, a metal high energy ray input window fitted to the envelope, and photoelectric screen held in the envelope at a point close to the high energy ray input window, and which is characterized in that a semiconductor photosensor is set at that position within the vacuum envelope which lies near the peripheral edge of the photoelectric screen and to which a material constituting the photoelectric screen can be deposited, said photoelectric screen comprising a sealed container provided with a light input window and a semiconductor element received in the container.