| 摘要 |
<p>An instrument for endodontic examination includes a camera (121, 52) to be placed into the oral cavity, an illumination device (122, 53) and a peep tube (116, 541). The peep tube (116, 541) is a hollow and tubular structure, located in the front of the lens (521) of the camera (121, 52), and made from opaque or semi-transparent material. The central line of the peep tube (116, 541) and the central line of the lens (521) of the camera (121, 52) are in the same direction. An incident light channel of the camera (121, 52) is formed by the hollow chamber of the peep tube (116, 541). The illumination device (122, 53) is mounted on the outer periphery of the peep tube, and is located above the camera (121, 52).</p> |
