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:
Feb. 04, 2020
Filed:
Dec. 27, 2017
Sintai Optical (Shenzhen) Co., Ltd., ShenZhen, Guandong Province, CN;
Asia Optical Co., Inc., Taichung, TW;
Ching-Chung Yeh, Taichung, TW;
SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, Guandong Province, CN;
ASIA OPTICAL CO., INC., Taichung, TW;
Abstract
A telephoto lens assembly comprises sequentially from an object side to an image side along an optical axis a first lens, a second lens, a stop, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative refractive power and includes a convex surface facing the object side. The second lens has negative refractive power and includes a convex surface facing the image side. The third lens has positive refractive power. The fourth lens has refractive power. The fifth lens has refractive power. The sixth lens has positive refractive power. The fourth lens and the fifth lens are cemented.