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Title:
LENS OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/020760
Kind Code:
A1
Abstract:
A lens optical system is disclosed. According to one embodiment of the present invention, a lens optical system, which has lenses sequentially arranged from an object side to an image side, may comprise: a first lens having positive refractive power and having an object-side surface convex toward the object side; a second lens having positive or negative refractive power; a third lens having positive or negative refractive power; and a fourth lens having negative refractive power and having an object-side surface concave toward the object side.

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Inventors:
JUNG GIL-SOO (KR)
KIM YU-JEONG (KR)
JUNG EUN-JUNG (KR)
Application Number:
PCT/KR2020/008956
Publication Date:
February 04, 2021
Filing Date:
July 08, 2020
Export Citation:
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Assignee:
J2C CO LTD (KR)
International Classes:
G02B9/34; G02B1/04; G02B3/02; G02B7/02; G02B13/00
Foreign References:
US20170235099A12017-08-17
CN106802477A2017-06-06
KR20080095497A2008-10-29
KR19990009759A1999-02-05
JP2008046526A2008-02-28
Attorney, Agent or Firm:
HANYANG PATENT FIRM (KR)
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