Abstract: A sighted device has a sight that includes an objective lens lying on an optical axis of the sight so that an input beam is coincident with the optical axis, an eyepiece lens lying on the optical axis, an imaging detector having a detector output signal, a signal processor that receives the detector output signal from the imaging detector, modifies the detector output signal, and has a processor output signal, and a video display projector that receives the processor output signal and has a video display projector output. An optical beam splitter lies on the optical axis. The beam splitter allows a first split subbeam of the input beam to pass to the eyepiece lens and reflects a second split subbeam of the input beam to the imaging detector. An optical mixer mixes the first split subbeam and the video display projector output prior to the first split subbeam passing through the eyepiece lens.

Abstract: A light source includes a first set of first beam sources having parallel output beams lying in a first-beam-source plane and a second set of second beam sources having parallel output beams lying in a second-beam-source plane. The first-beam-source output beams are parallel to the second-beam-source output beams, but are spatially offset in a direction perpendicular to the first-beam-source output beams. A spatial optical interleaver disposed receives the first-beam-source output beams and the second-beam-source output beams. The first-beam-source output beams pass unimpeded through a set of first-beam openings in the spatial optical interleaver, and the second-beam-source output beams are reflected parallel to the first-beam-source output beams and in the first-beam-source plane.

Abstract: A housing for underwater imaging comprising a first section for housing an optical instrument; a second section secured to the first section adapted to house a window; a window disposed within the second section; and a buffer ring disposed between the window and the first section. The buffer ring is a material having a coefficient of thermal expansion approximately equal to that of the window. In the best mode, the window is optical grade glass and the buffer ring is aluminum foil. In the illustrative embodiment, a mounting ring is disposed between the buffer ring and the second section of the housing. The mounting ring is steel and must be polished, lapped, stainless steel as well. The buffer ring protects the glass window from the mounting ring. A third ring is disposed over the window and secures it to the second section of the housing.

Abstract: A reticle illumination system. The novel system includes a first light source adapted to output light toward a target surface and a material having a predetermined index of refraction disposed between the first light source and the target surface for coupling light from the first light source to the target surface. In an illustrative embodiment, the material is a glue or epoxy having an index of refraction matching that of the target surface, and the target surface is a prism surface upon which a reticle is disposed. The system also includes a second light source adapted to output light into the material such that the light is reflected and scattered off of an exit end of the fiber, and/or off of scattering centers distributed throughout the material, towards the target surface.

Abstract: A riflescope. In the illustrative embodiment, the inventive riflescope is implemented with a housing having an exterior surface and a texture applied to the surface of the housing. In the best mode, the texture has an elevation of 250 microns above the surface of the housing. In more specific embodiments, the texture is uniform and geometric.

Abstract: An optical sight includes an optical train having an optical path therethrough, an entrance, and an exit. A reticle is visible through the exit of the optical path. An unpowered reticle illumination source has a first light source that illuminates the reticle responsive to the level of ambient light, and a second light source that illuminates the reticle with an unpowered light source. The reticle illumination source preferably has a scintillation material positioned so that ambient light entering the ambient-light receiver is incident upon the scintillation material, whereupon the scintillation material responsively emits secondary light. A light-gathering prism receives the secondary light and has a diffusing surface disposed to illuminate the reticle using the secondary light. An unpowered light source is positioned to emit light through the diffusing surface to be incident upon the reticle. The unpowered light source may be a tritium light source.