Compact see-through night vision goggles

Details Compact see-through night vision goggles Compact see-through night vision goggles

G - Physics

02

B

88/38, 88/7.5

G02B 13/14 (2006.01) G02B 9/12 (2006.01) G02B 23/12 (2006.01) G02B 23/16 (2006.01) G02B 25/00 (2006.01)

Patent

CA 1298500

ABSTRACT OF THE DISCLOSURE The goggles include a pair of optical assemblies, each having two intersecting optical paths, including a see-through path with a large field of view on a straight line of sight to the viewed object, and a folded path which includes an objective lens set, an intensifier which converts visible and infrared light to a visible intensified light, and an eyepiece lens set, arranged in a loop in a plane perpendicular to the see-through path. Infrared and visible light from the viewed object enters both paths. A dichroic prism combiner at the intersec- tion of the paths reflects intensified light from the folded path into the see-through path and transmits all other light. In one embodiment a dichroic prism separator is disposed at the intersection of the paths forward of the combiner for transmitting a portion of the incoming visible light along the see-through path and reflecting the remainder of the incoming light to the folded path. In another embodiment, the entrance to the folded path is spaced from the see-through path.

502912

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