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:
May. 17, 2022
Filed:
Jun. 18, 2019
Newmax Technology Co., Ltd., Taichung, TW;
Kun-Rui Wu, Taichung, TW;
Chun-Sheng Lee, Taichung, TW;
NEWMAX TECHNOLOGY CO., LTD., Taichung, TW;
Abstract
A four-piece dual waveband optical lens system includes, in order from the object side to the image side: a stop; a first lens element with a positive refractive power having an object-side surface being convex near an optical axis, an image-side surface being convex near the optical axis; a second lens element with a negative refractive power having an object-side surface being concave near the optical axis, an image-side surface being convex near the optical axis; a third lens element with a positive refractive power having an object-side surface being concave near the optical axis, an image-side surface being convex near the optical axis; a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis, an image-side surface being concave near the optical axis, which has a short length and good performance without re-focusing in visible light and infrared dual waveband.