초록 ▼

An integrated day and night sighting system and a laser rangefinder apparatus includes a daylight objective lens having a night light corrector lens mounted adjacent to and coaxially with the daylight objective lens and having an eyepiece lens. An image converter module may be an image intensifier f

An integrated day and night sighting system and a laser rangefinder apparatus includes a daylight objective lens having a night light corrector lens mounted adjacent to and coaxially with the daylight objective lens and having an eyepiece lens. An image converter module may be an image intensifier for night light use and is movably supported for movement between a daylight position out of the light path and a night light position in the light path. The image converter is positioned to focus the night light optics thereon and for the eyepiece lens to view the image intensifier screen. A night primary objective mirror is positioned to reflect light from the night objective lens and a night secondary mirror is positioned to receive light from the primary objective mirror and to focus the night light onto the image converter when the image converter is in the night light position. This allows a refractive day sight to be integrated with a reflective night sight. The night light corrector lens are tilted in the rangefinder to compensate for beamsplitter astigmatism to give diffraction limited on-axis performance. The sighting system is incorporated into a laser rangefinder having a laser for transmitting a laser beam and a receiver for receiving the reflected laser beam.

대표청구항 ▼

[We claim:] [1.]a daylight optical system having daylight optics for collecting and focusing visible light from an objective lens onto an eyepiece lens assembly in a daylight light path between said objective lens and said eyepiece lens assembly;a night light corrector lens mounted adjacent said day

[We claim:] [1.]a daylight optical system having daylight optics for collecting and focusing visible light from an objective lens onto an eyepiece lens assembly in a daylight light path between said objective lens and said eyepiece lens assembly;a night light corrector lens mounted adjacent said daylight objective lens, said night correction lens including a pair of tilted lens elements to compensate for astigmatism;an image converter for night light use and being movably supported for movement into and out of the daylight light oath between a daylight position out of the light path and a night light position in the light path, said image converter being positioned for said eyepiece lens assembly to focus thereon when said image converter is in said light path;a night reticle display positioned between said image converter and said eyepiece lens assembly;a night light primary mirror positioned to reflect light from said night light corrector lens; anda night light secondary mirror positioned to receive light from said night primary objective mirror and to focus the light onto said image converter when said image converter is in a night light position, whereby an integrated night and day light optical system is provided in a compact packaging.