Title:
FISHEYE LENS DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/019496
Kind Code:
A1
Abstract:
Disclosed is a fisheye lens device capable of both making the amount of information at a peripheral portion larger and realizing miniaturization. The fisheye lens device (10) comprises a first lens (L1) of negative refractive power, a second lens (L2) of negative refractive power, a third lens (L3) of positive refractive power, a diaphragm (12), a fourth lens (L4) of positive refractive power, a fifth lens (L5) of positive refractive power and a sixth lens (L6) of negative refractive power arranged in sequence from an object side. In the case that the focal length of the fisheye lens device is f, the angle of incidence of the light incident on the fisheye lens device is θ, the height of an image formed in an image plane is y, and an optical total length is ΣD, the conditions y＝2•f•tan(θ/2) and ΣD/2y≦5.0 are met.
Inventors:
MAO QING (CN)
LI SHUNNAN (CN)
DENG LIANGJUN (CN)
LI SHUNNAN (CN)
DENG LIANGJUN (CN)
Application Number:
PCT/CN2017/112739
Publication Date:
January 31, 2019
Filing Date:
November 24, 2017
Export Citation:
Assignee:
JCD GUANGZHOU OPTICAL CORPORATION LTD (CN)
International Classes:
G02B13/06; G02B9/62
Foreign References:
| CN201289539Y | 2009-08-12 | |||
| CN102369471A | 2012-03-07 | |||
| CN202693897U | 2013-01-23 | |||
| CN203133373U | 2013-08-14 |
Attorney, Agent or Firm:
JIAQUAN IP LAW FIRM (CN)
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