| 摘要 |
<p>An optical system comprising at least one illumination element and at least one receiving means, both disposed behind a single optical window, having a plurality of reflecting surfaces, wherein
said optical window is configured such that it defines a shape having at least one focal curve; and
wherein at least one illumination element and at least one receiving means are positioned in proximity of the focal curve plane, such that, when illuminating, rays from the illumination element, that are internally reflected from the optical window surfaces, will not be incident on the receiving means.</p> |
