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Patent Searching and Data


Title:
ULTRA WIDE-ANGLE LENS
Document Type and Number:
WIPO Patent Application WO/2020/221137
Kind Code:
A1
Abstract:
An ultra wide-angle lens (1), which comprises a lens group composed of a glass material, wherein the lens group sequentially comprises from the object side to the imaging surface: a first lens (11) with a negative focal power, wherein the first lens (11) is a meniscus spherical lens with a concave surface facing the imaging surface; a second lens (12) with a negative focal power, wherein the second lens (12) is a meniscus spherical or aspheric lens; a third lens (13) with a negative focal power, wherein the third lens (13) is a meniscus spherical lens with a concave surface facing the object side; a fourth lens (14) with a positive focal power, wherein the fourth lens (14) is a double convex aspheric lens, a meniscus aspheric lens or a double convex aspheric lens; a fifth lens (15) with a positive focal power, wherein the fifth lens (15) is a double convex spherical lens or a meniscus spherical lens with a concave surface facing the imaging surface; a sixth lens (16) with a negative focal power, wherein the sixth lens (16) is a double concave spherical lens; a seventh lens (17) with a positive focal power, wherein the seventh lens (17) is a double convex spherical lens; and an eighth lens (18) with a positive focal power, wherein the eighth lens (18) is a double convex aspheric lens. The use of all-glass lenses has a longer service life and higher stability, and effectively reduces the lens processing difficulty and manufacturing cost.

Inventors:
HAN JIAN (CN)
GAO BO (CN)
LI WEINA (CN)
HUANG JIANXIN (CN)
Application Number:
PCT/CN2020/086775
Publication Date:
November 05, 2020
Filing Date:
April 24, 2020
Export Citation:
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Assignee:
JIANGXI LIANCHUANG ELECT CO LTD (CN)
International Classes:
G02B13/00; G02B13/06; G02B13/18
Foreign References:
CN110133827A2019-08-16
CN108519660A2018-09-11
CN106338816A2017-01-18
CN102360118A2012-02-22
CN107632379A2018-01-26
CN104007535A2014-08-27
US20170242220A12017-08-24
Attorney, Agent or Firm:
SHENZHEN ZHIQUAN INTELLECTUAL PROPERTY OFFICE (CN)
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