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:
Apr. 28, 2020
Filed:
Jul. 19, 2018
Applicant:
Rays Optics Inc., Hsinchu County, TW;
Inventors:
Chen-Yi Tsai, Hsinchu County, TW;
Chen-Cheng Lee, Hsinchu County, TW;
Assignee:
Rays Optics Inc., Hsinchu County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01); G02B 9/60 (2006.01);
U.S. Cl.
CPC ...
G02B 7/021 (2013.01); G02B 9/60 (2013.01);
Abstract
A lens including a lens barrel and five lens elements is provided. A relation between the amount of field curvature variation Saof a system caused by a thickness tolerance of a lens element in the lens and an amount of field curvature variation Saof the system caused by a change of a gap between the lens element and an adjacent lens element thereof is described as follows. Sais twice or less of Sa. Saand Saare both positive values or both negative values to render a better field curvature performance of the lens. A manufacturing method of the lens is also provided.