Title:
OPTICAL IMAGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/233195
Kind Code:
A1
Abstract:
Provided is an optical imaging system, along an optical axis and from an object side to an image side, sequentially comprising: a first lens (L1), a second lens (L2), a third lens (L3) and a fourth lens (L4), wherein the first lens has a positive focal power or a negative focal power, an object-side surface (S1) thereof is a concave surface, and an image-side surface (S2) thereof is a convex surface; both the second lens and the third lens have a positive focal power; the fourth lens has a positive focal power or a negative focal power; an Abbe number V1 of the first lens and an Abbe number V4 of the fourth lens satisfy the relationship |V1-V4| ≤ 20; and the Abbe number V1 of the first lens and an Abbe number V2 of the second lens satisfy the relationship 20 ≤ |V1-V2| ≤ 50.
Inventors:
WANG XINQUAN (CN)
Application Number:
PCT/CN2017/111841
Publication Date:
December 27, 2018
Filing Date:
November 20, 2017
Export Citation:
Assignee:
ZHEJIANG SUNNY OPTICAL CO LTD (CN)
International Classes:
G02B13/00; G02B9/34; G02B15/00
Foreign References:
| CN107092077A | 2017-08-25 | |||
| CN106468813A | 2017-03-01 | |||
| CN106526801A | 2017-03-22 | |||
| CN105988192A | 2016-10-05 | |||
| CN105572851A | 2016-05-11 | |||
| CN106597636A | 2017-04-26 | |||
| CN105319678A | 2016-02-10 | |||
| CN106019535A | 2016-10-12 | |||
| CN105842824A | 2016-08-10 |
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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