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1. (WO2018218889) OPTICAL IMAGING SYSTEM

Pub. No.:    WO/2018/218889    International Application No.:    PCT/CN2017/111842
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue Nov 21 00:59:59 CET 2017
IPC: G02B 15/177
G02B 9/64
G02B 13/00
Applicants: ZHEJIANG SUNNY OPTICAL CO., LTD
浙江舜宇光学有限公司
Inventors: YANG, Jian
杨健
WENREN, Jianke
闻人建科
Title: OPTICAL IMAGING SYSTEM
Abstract:
An optical imaging system, comprising: in sequence from an object side to an image side along the optical axis, a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7). The first lens has a negative power, and the image side of the first lens is a concave surface; the fourth lens has a positive power; the fifth lens has a positive power or a negative power, and the image side of the fifth lens is a concave surface; the seventh lens has a positive power or a negative power, and the image side of the seventh lens is aspherical and at least has a point of inflexion; the second lens, the third lens and the sixth lens respectively has a positive or negative power; and the effective radius DT11 of the object side of the first lens and a half of the diagonal length ImgH of an effective pixel area of an electric photosensor of the optical imaging system satisfy: 0.5