Title:
TELEPHOTO VISIBLE LIGHT CONTINUOUS ZOOM LENS
Document Type and Number:
WIPO Patent Application WO/2022/198787
Kind Code:
A1
Abstract:
A telephoto visible light continuous zoom lens, comprising a front fixed group (L1) having positive focal power, a zoom group (L2) having negative focal power, a compensation group (L3) having positive focal power, a diaphragm (SP), and a rear fixed group (L4) having positive focal power which are sequentially arranged from an object surface to an image surface along a light incident direction. The zoom group (L2) and the compensation group (L3) can perform axial motion along an optical axis. The lens is compact in structure, and has a focal length variation range of 150 mm to 2400 mm, a zoom ratio reaching 16 times, and an imaging target surface greater than 1 inch.
Inventors:
QU LIHUI (CN)
HE WENBO (CN)
XIAO WEIJUN (CN)
WANG FEN (CN)
WANG JIANPING (CN)
HE WENBO (CN)
XIAO WEIJUN (CN)
WANG FEN (CN)
WANG JIANPING (CN)
Application Number:
PCT/CN2021/097166
Publication Date:
September 29, 2022
Filing Date:
May 31, 2021
Export Citation:
Assignee:
FUJIAN FORECAM OPTICS CO LTD (CN)
International Classes:
G02B15/14; G02B1/00; G02B15/15
Foreign References:
| CN106125274A | 2016-11-16 | |||
| CN104199178A | 2014-12-10 | |||
| US20120194918A1 | 2012-08-02 | |||
| CN109116530A | 2019-01-01 |
Attorney, Agent or Firm:
FUZHOU YUANCHUANG PATENT AND TRADEMARK AGENT LTD. (CN)
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