| 摘要 |
The present invention relates to a focusing device having an operation mode, the focusing device comprising: three guiding members, a belt, and a lens arrangement comprising a threaded portion:
the three guiding members surrounding the lens arrangement,
at least one of the guiding members comprising a threaded portion,
the threaded portions of the at least one guiding member and the lens arrangement being arranged to engage with each other, wherein, when in operation mode, the belt is arranged around the three guiding members such that the three guiding members are urged towards the lens arrangement, and the at least one of the guiding members comprising a threaded portion is arranged to be rotated thus rotating the lens arrangement. |
