| 摘要 |
An auto-focusing image-forming lens set, which includes a first optical system, a second optical system and an image forming face arranged in line along an optical axis. The first optical system has a predetermined number of convex lenses arranged along the optical axis, and defines with image forming face a fixed distance. The second optical system has one convex lens arranged on the optical axis and movable along the optical axis by a low-power driving source to change the distance between the second optical system and the image forming face and to automatically adjust the focus
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