JCIPRNET
Zoom lens
A zoom lens arranged along an optical axis includes a first lens group and a second lens group. The second lens group has at least one aspheric lens. The first lens group moves toward an image side and the second lens group moves away from the image side along the optical axis during zooming. The first lens group is moved for focusing, and the second lens group is moved for zooming.
Young Optics Inc.
G G G
G02B G02B G02B
inventional inventional additional
Yu-Hung Kuo-Chuan Bing-Ju Kai-Yun Pin-Hsuan
Chou Wang Chiang Chen Hsieh