Robert G Gallagher

US Patent:

59948248, Nov 30, 1999

Filed:

Jul 24, 1997

Appl. No.:

8/899725

Inventors:

Nils I. Thomas - Roanoke VA
James W. Harris - Moneta VA
Walter E. Blouch - Roanoke VA
Warren D. Vrescak - Roanoke VA
George A. Hambro - Blue Ridge VA
Mark L. Oyler - Roanoke VA
Stanley J. Clower - Roanoke VA
Nelson C. Devoe - Roanoke VA
Robert A. Gallagher - Roanoke VA

Assignee:

ITT Manufacturing Enterprises - Wilmington DE

International Classification:

H01J 4300

US Classification:

313105CM

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 operable to provide an electrical contact external to the housing; and the fiber optic inverter having a unitarily formed and circumferentially extending flange portion extending toward the housing, wherein a sealing material sealingly engages an inner surface of an output flange with the inverter flange portion to form an air impervious vacuum seal, the output flange supported by the inverter flange portion.

US Patent:

52047741, Apr 20, 1993

Filed:

Dec 6, 1991

Appl. No.:

7/803036

Inventors:

R. Calvin Owen - Lincoln MA
Robert A. Gallagher - Roanoke VA
Robert M. Burley - Concord MA

Assignee:

Varo Inc. - Garland TX

International Classification:

G02B 2300
G02B 1300

US Classification:

359418

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.

US Patent:

52705455, Dec 14, 1993

Filed:

Nov 30, 1992

Appl. No.:

7/982881

Inventors:

Earle N. Phillips - Roanoke VA
Robert A. Gallagher - Roanoke VA

Assignee:

ITT Corporation - New York NY

International Classification:

G05D 2500
F41G 132

US Classification:

250330

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.

US Patent:

61411469, Oct 31, 2000

Filed:

Feb 16, 1993

Appl. No.:

8/017875

Inventors:

R. Calvin Owen - Lincoln MA
Robert A. Gallagher - Roanoke VA
Robert M. Burley - late of Concord MA
by Juliet E. Mason - Newburyport MA

Assignee:

Litton Systems, Inc. - Woodland Hills CA

International Classification:

G02B 1316
G02B 2304

US Classification:

359407

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.