Title:
OPTICAL LENS, IMAGING DEVICE, ELECTRICAL DEVICE, METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2021/196057
Kind Code:
A1
Abstract:
An optical lens (40) includes at least one lens element and a casing to accommodate the lens. The optical lens (40) satisfies a condition that an MTF A is equal to or greater than D 100 Co X MTF 0. The MTF A is an X-coordinate of the MTF curve in a second coordinate system when the percentage of an image height H is H A, the H A is a Y-coordinate of an intersection point of a first linear line and a second linear line of a distortion curve in a first coordinate system, the distortion ratio D 100 is a distortion ratio D at 100 percent of the image height H 100, the MTF 0 is a percentage of the contrast MTF when the percentage of the image height H 0 is 0, and the C 0 is a coefficient to adjust a minimum percentage of the contrast MTF A.
Inventors:
KAMATA TETSUJI (JP)
Application Number:
PCT/CN2020/082650
Publication Date:
October 07, 2021
Filing Date:
April 01, 2020
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
G02B13/00
Domestic Patent References:
| WO2004059361A1 | 2004-07-15 | |||
| WO2010144853A2 | 2010-12-16 |
Foreign References:
| CN211698374U | 2020-10-16 | |||
| CN102236155A | 2011-11-09 | |||
| CN1885087A | 2006-12-27 | |||
| US20170023775A1 | 2017-01-26 | |||
| CN101126886A | 2008-02-20 | |||
| CN110727966A | 2020-01-24 | |||
| CN110519486A | 2019-11-29 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
Download PDF:
Previous Patent: LAMP, QUICK-DOCKING JUNCTION BOX, AND MOUNTING METHOD THEREFOR
Next Patent: PORT SHIP MONITORING DEVICE AND MONITORING METHOD
Next Patent: PORT SHIP MONITORING DEVICE AND MONITORING METHOD