The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2022
Filed:
Nov. 25, 2019
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Yu-Chung Su, New Taipei, TW;
Chun-Cheng Ko, New Taipei, TW;
HON HAI PRECISION INDUSTRY CO., LTD., New Taipei, TW;
Abstract
A lens module includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and an imaging surface, arranged in that sequence from an object side to an image side. The lens module uses infrared light which has a wavelength ranging from 920 to 970 nm, the lens module satisfies the following conditions: 0.0002<|1/F1|<0.01; D/TTL>1.1; CT4/ET4<1.8; F1 denotes a focal length of the first lens, D denotes a diameter of a largest imaging circle of the lens module, TTL denotes a distance between an object side surface of the first lens to the imaging surface, CT4 denotes a central thickness of the fourth lens, ET4 denotes an edge thickness of the fourth lens.