Abstract: There is provided an improved night vision goggle having a housing containing an objective lens assembly, an image intensifier tube, a collimator assembly, a splitter member, and a pair of afocal telescopes. The optical axis of the afocal telescopes are offset from the optical axis of the collimator and objective lens assemblies. A pair of achromatic doublet lens assemblies are mounted side-by-side on the exit side of the collimator and near the entrance pupils of the telescopes. The optical axes of the doublet lens assemblies are coaxial with the optical axes of the telescopes. The achromatic doublet lens assemblies thus collect light from a sub-diameter, decentered aperture of the collimator assembly, and correct axial chromatic aberration in the telescopes.

Abstract: An improved image intensifier tube having electrically operative components that include a photocathode having a photoemissive layer, a microchannel plate having a conductive input surface and a conductive output surface, and a vacuum housing for retaining the photocathode, the microchannel plate and a fiber optic inverter in a predetermined arrangement within an evacuated environment, the fiber optic inverter having a phosphor screen for receiving the electrons emitted by the cathode and converting the electrons into a visual image, the improvement therewith comprising a ring assembly disposed in the housing comprising first and second rings, the first ring being a metallized snap ring conductively contacting the input surface of the microchannel plate for providing electrical contact to and retaining the plate within the housing, the second ring being a metallized ceramic ring having a first chamfered metallized surface in electrical contact with the metallized snap ring and a second metallized surface oper

Abstract: An external compass module for use with a night vision device. The module includes an annular ring which is adapted to fit a portion of the night vision device which contains the objective lens. The module further includes an enclosure having an internal chamber. A compass sensor having an angular scale for indicating direction is positioned within the chamber. Optical elements are positioned adjacent to the scale which relay and collimate an image of the scale to a reflecting lens element. The reflecting lens element then reflects the scale image toward the objective lens which results in the superimposition of the scale image on a scene being viewed by the user.

Abstract: There is provided an improved night vision goggle having a housing containing an objective lens assembly, an image intensifier tube, a collimator assembly, a splitter member, and a pair of afocal telescopes. The optical axis of the afocal telescopes are offset from the optical axis of the collimator and objective lens assemblies. A pair of achromatic doublet lens assemblies are mounted side-by-side on the exit side of the collimator and near the entrance pupils of the telescopes. The optical axes of the doublet lens assemblies are coaxial with the optical axes of the telescopes. The achromatic doublet lens assemblies thus collect light from a sub-diameter, decentered aperture of the collimator assembly, and correct axial chromatic aberration in the telescopes.

Abstract: A charging device suitable for use in processing scrap comprising a charge box open at the top, a pusher, and a moveable plate supported for sliding movement from a position with the charge box open to a position to close the charge box; the charge box having a top, bottom, front and rear, the charge box for receiving scrap through the top thereof and being in communication at the front thereof with an apparatus for handling scrap; the scrap being pushed by the pusher for pushing the contents of the charge box into the apparatus for handling scrap, the pusher being moveable from a position at the rear of the charge box remote the apparatus for handling scrap to a position at the front of the charge box proximate the apparatus for handling scrap; the pusher being supported by a support frame fully enclosing the pusher, when the pusher is remote the scrap receiving process; the moveable plate having a shearing edge at its leading edge and for co-operative movement with the pusher, the moveable plate being movea