Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PHOTOGRAPHING OPTICAL LENS
Document Type and Number:
WIPO Patent Application WO/2021/031275
Kind Code:
A1
Abstract:
A photographing optical lens (10) sequentially comprises, from an object side to an image side: a first lens (L1) having positive refractive power; a second lens (L2) having negative refractive power; a third lens (L3) having positive refractive power; and a fourth lens (L4) having negative refractive power, wherein the focal length of the first lens (L1) is f1, the focal length of the second lens (L2) is f2, the focal length of the fourth lens (L4) is f4, the radius of curvature of the object side surface of the fourth lens (L4) is R7, the radius of curvature of the image side surface of the fourth lens (L4) is R8, the axial thickness of the first lens (L1) is d1, the axial distance between the image side surface of the first lens (L1) and the object side surface of the second lens (L2) is d2, and the following relations are met: -0.75 ≤ f1/f2 ≤ -0.67, 0.32 ≤ f4/f2 ≤ 0.40, 5.00 ≤ R7/R8 ≤ 6.00, and 1.40 ≤ d1/d2 ≤ 3.20. The photographing optical lens (10) meets the requirements of wide-angle and ultrathin design while exhibiting good optical performance.

Inventors:
SHI RONGBAO (CN)
CHEN JIA (CN)
TERAOKA HIROYUKI (JP)
Application Number:
PCT/CN2019/107151
Publication Date:
February 25, 2021
Filing Date:
September 21, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
AAC OPTICS CHANGZHOU CO LTD (CN)
International Classes:
G02B13/00; G02B13/06; G02B13/18
Foreign References:
CN105892019A2016-08-24
CN206147165U2017-05-03
CN201298101Y2009-08-26
CN105467558A2016-04-06
CN104880811A2015-09-02
US20170192201A12017-07-06
Attorney, Agent or Firm:
GUAGDONG GUANGHE LAW FIRM (CN)
Download PDF:



 
Previous Patent: PHOTOGRAPHING OPTICAL LENS

Next Patent: PHOTOGRAPHIC OPTICAL LENS