| 摘要 |
<p>The graticule apparatus 1 includes a graticule 4, a source of light, such as an LED 5, arranged to illuminate the graticule and an optical system arranged to produce an image of the graticule. The optical system may include a prism 6 having reflective surfaces 8, 9, and a lens 3. The apparatus is particularly suitable for use with a sight having moveable lenses, as the graticule does not undergo lateral movement when a lens is moved, which was a problem hitherto with e.g. graticules in zoom lenses. The apparatus is also suitable for use in low light conditions in conjunction with, for example, an image intensifier. <IMAGE></p> |
