| 摘要 |
A barrel includes a supporting part at one end of the barrel adjacent to an image side, and a plurality of protrusions formed on an inner surface of the barrel. Each protrusion includes a guiding surface and an engaging surface connected with the guiding surface. Each guiding surface is oblique relative to a central axis of the barrel. A distance between the central axis and a portion of the guiding surface adjacent to the image side is larger than that between the central axis and another portion of the guiding surface next to an object side. The engaging surface and the supporting part cooperatively clamp optical components in the barrel. |
