Title:
OPTICAL IMAGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/209855
Kind Code:
A1
Abstract:
An optical imaging system, having an effective focal length f and an Entrance Pupil Diameter (EPD), and comprising 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) which are arranged along the optical axis from the object side to the image side in sequence. The third lens has the negative focal power; the fifth lens has the positive focal power or negative focal power, and an image side surface (S10) thereof is a convex surface; the seventh lens has the positive focal power or negative focal power, and an object side surface thereof is a concave surface (S13); the first lens, the second lens, the fourth lens and the sixth lens respectively have the positive focal power or negative focal power; and the distance TTL between the object side surface (S1) of the first lens and an imaging surface (S15) on the optical axis and half ImgH the length of a diagonal line of an effective pixel region on the imaging surface of the optical imaging system meet the following condition: TTL/ImgH<1.6.
Inventors:
DAI FUJIAN (CN)
WENREN JIANKE (CN)
WENREN JIANKE (CN)
Application Number:
PCT/CN2017/102633
Publication Date:
November 22, 2018
Filing Date:
September 21, 2017
Export Citation:
Assignee:
ZHEJIANG SUNNY OPTICAL CO LTD (CN)
International Classes:
G02B13/00; G02B9/64; G02B13/18
Foreign References:
| CN107153257A | 2017-09-12 | |||
| CN104950425A | 2015-09-30 | |||
| CN104965295A | 2015-10-07 | |||
| CN205091499U | 2016-03-16 | |||
| CN105319680A | 2016-02-10 | |||
| US20160139372A1 | 2016-05-19 |
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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