公开(公告)号：US10302919B2

公开(公告)日：2019-05-28

申请号：US15588218

申请日：2017-05-05

申请人： Anhui Changgeng Optics Technology Co., LTD

发明人： Xiaohua Zhang

IPC分类号： G02B13/04 ,  G02B13/06 ,  G02B13/00

摘要： A mirrorless large-aperture ultra wide-angle lens relates to a wide-angle lens of which a full angle of view is over 100 degrees, and sequentially comprises two parts from an object side to an image side: a first lens group Gr1 having a positive diopter and a second lens group Gr2 having a positive diopter; when an object moves closer from infinity, the first lens group Gr1 is fixed, the second lens group Gr2 moves towards the object to implement an ultra wide-angle microlens which is in focus and meets the following conditional expression: 2.0≤F1/F2≤10, wherein F1: a focal length of the first lens group Gr1; and F2: a focal length of the first lens group Gr2. The Invention can provide a miniaturized, high-performance, low-cost ultra wide-angle lens whose angle of view is over 100 degrees, achieving strong universality.