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. 10, 2022
Filed:
May. 25, 2019
Applicant:
Beijing Ned+ar Display Technology Co., Ltd., Beijing, CN;
Inventors:
Dewen Cheng, Beijing, CN;
Qiwei Wang, Beijing, CN;
Assignee:
Beijing NED+AR Display Technology Co., Ltd., Beijing, CN;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 27/09 (2006.01); G02B 27/12 (2006.01); G06F 3/01 (2006.01); G02B 5/04 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/04 (2013.01); G02B 27/01 (2013.01); G02B 27/0955 (2013.01); G02B 27/0972 (2013.01); G02B 27/12 (2013.01); G06F 3/011 (2013.01); G02B 2027/011 (2013.01);
Abstract
A freeform prism-lens group includes: a primary prism; a first auxiliary lens; and a beamsplitter film between the primary prism and the first auxiliary lens and having a predetermined beamsplitting ratio; wherein: the first auxiliary lens has a first optical surface substantially conforming to a neighboring freeform surface of the primary prism; and the first auxiliary lens has a second opposing optical surface distal from the primary prism that is planar, aspheric, or spherical with a curvature radius greater than 100 mm.