| 摘要 |
<p>The device has an imaging optics comprising a deflecting lens (7) arranged on an optical axis in front of a opto receiver (3) and supported in a rotating axis by pivot arms. The lens attached to the pivot arms includes an optical component influencing a focal length of the imaging optics, so that an effective optical back focus and the focal length of the imaging optics are changeable, during rotation of pivot arms.</p> |
