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. 02, 2020
Filed:
Aug. 07, 2017
Young Optics Inc., Hsinchu Science Park, TW;
Nalux Co., Ltd., Osaka, JP;
Yuan-Hung Su, Hsinchu Science Park, TW;
Sheng-Tang Lai, Hsinchu Science Park, TW;
Kuo-Chuan Wang, Hsinchu Science Park, TW;
Norihisa Sakagami, Hsinchu Science Park, TW;
YOUNG OPTICS INC., Hsinchu, TW;
Abstract
An optical lens includes a first lens group with negative refractive power, a second lens group with positive refractive power, and an aperture stop disposed between the first lens group and the second lens group. A total number of lenses in the first lens group is less than three, and a total number of lenses in the second lens group is less than five. The second lens group includes a first lens, a second lens and a third lens arranged in order in a direction away from the aperture stop. Each of the first lens and the second lens is an aspheric lens, and one of the first lens and the second lens has a diffractive optical surface.