Optical: systems and elements – Compound lens system – Telescope
Patent
1997-07-28
2000-08-29
Nguyen, Thong
Optical: systems and elements
Compound lens system
Telescope
359399, 359424, 359428, G02B 2300
Patent
active
061116920
ABSTRACT:
A multi-function day
ight observation, ranging, and sighting device includes a single objective lens and a single eyepiece lens, and at the eyepiece lens provides an image of a scene. The single objective lens leads to a visible-light first optical path, and to an invisible-light second optical path. The invisible-light second optical path includes an image intensifier tube providing a visible image. The first and second optical paths converge with visible images being provided by each pathway overlaying at a reticule plane. A single light path leads from the reticule plane to the eyepiece lens. A lens group includes a lens through which light from the scene is transmitted to be focused at an image plane. A focus cell body carries at least one lens of the lens group, and a support structure of the device movably supports the focus cell body for controlled lateral relative movement. Thus, selected and controlled lateral movement of the focus cell body correspondingly moves the image laterally at the eyepiece lens. Methods of the device's operation are also disclosed.
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Litton Systems Inc.
Nguyen Thong
LandOfFree
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