| 摘要 |
An optical sighting device for a rifle or other article to be aimed at a target includes a frame for mounting to the rifle and a very short sighting window atop the frame. A light source in the frame powered by a battery shines a beam of light toward the sighting window which incorporates a retro-collimating beam-splitter so that the marksman sees in the window an image of the reticle in the form of a spot of light superimposed on the target image. When he moves the rifle to place the reticle image at a selected spot on the target image and fires the rifle, the bullets leaving the rifle will strike that spot on the actual target. The sighting device also includes means for adjusting the position of the reticle to compensate for the effects of gravity and wind on the bullets and means for adjusting the relative intensity of the reticle and target images to suit the marksmans preference and to compensate for changes in the ambient light in the vicinity of the sighting device.
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