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:
Jun. 03, 2025
Filed:
Aug. 07, 2019
Jiangxi Jingchao Optical Co., Ltd., Nanchang, CN;
Hairong Zou, Nanchang, CN;
Yuming Le, Nanchang, CN;
Byoungtaek Yoo, Nanchang, CN;
Binli Lan, Nanchang, CN;
JIANGXI JINGCHAO OPTICAL CO., LTD., Nanchang, CN;
Abstract
An optical system, sequentially comprising from an object side to an image side: a first lens having a negative refractive power, an object-side surface of the first lens being a convex surface, and an image-side surface thereof being a concave surface; a second lens having a negative refractive power, an image-side surface of the second lens being a concave surface; a third lens having a positive refractive power; a diaphragm; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power. The optical system satisfies the following relationship: (SD S)/(RDY S)<0.93, wherein SD Sis the Y-direction half aperture of the image-side surface of the first lens, and RDY Sis the Y radius of the image-side surface of the first lens.