05903996 is referenced by 19 patents and cites 6 patents.

A multi-function day/night observation, ranging, or sighting device includes a single objective lens and a single eyepiece lens and provides an image of a distant 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 provided by along each path being overlaid at a reticule plane. A single light path leads from the reticule plane to the eyepiece lens. A laser provides laser light projected into the scene, and the image intensifier tube is used as a detector for a portion of the laser light reflected from an object in the scene in order to provide imaging or a laser range finding functions. The device includes provisions for controlling an operating temperature of the laser to a selected one of at least two temperatures which are above ambient temperature, and at which the laser produces laser light of correspondingly differing wavelengths. At least a pair of optical band-pass filters each corresponding to one of the wavelengths of light produced by the laser are available for use during day-time operations in order to improve a signal-to-noise ratio of the device methods of the device's operation are also disclosed.

Day/night viewing device with laser range finder utilizing two wavelengths of laser light, and method of its operation
Application Number
Publication Number
Application Date
August 1, 1997
Publication Date
May 18, 1999
Roland M Morley
401 E. Del Rio Dr., Tempe, 85282
Terry L Miller
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