| 摘要 |
<p>The detector has a cap (20) with emit and receive lenses that are positioned in front of emit and receive units, respectively. An electronic card and the cap are fixed to a fixing support that is made of an opaque material. The fixing support has a protruding central blade (31) that is inserted between the lenses into a separating slot in the cap. The blade separates emitted and received light rays in the detector.</p> |
