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. 18, 2020
Filed:
Jul. 24, 2018
Nanchang O-film Optical-electronic Tech Co., Ltd, Nanchang, CN;
Tomio Tabata, Tokyo, JP;
NANCHANG O-FILM OPTICAL-ELECTRONIC TECH CO., LTD, Nanchang, CN;
Abstract
An imaging optical system, including: a first lens being a meniscus lens with a positive refractive power, the first lens having a convex surface facing the object side; a second lens being a biconvex lens; a third lens being a meniscus lens with a negative refractive power, the third lens having a convex surface facing the object side; a fourth lens being a meniscus lens, the fourth lens having a convex surface or a concave surface facing the object side; a fifth lens having a concave surface facing the object side; and a sixth lens having a convex surface facing the image side; at least one surface of two surfaces of the lenses Lto Lhas an aspherical shape. The imaging optical system satisfies the following conditions (1) and (2):0.23<<0.29  (1)0.9<TTL/<1.0  (2).