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. 06, 2008
Filed:
Jan. 04, 2006
Applicant:
Hui-qing Chen, Hang-Zhou, CN;
Inventor:
Hui-Qing Chen, Hang-Zhou, CN;
Assignee:
Asia Optical Co., Inc., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 25/00 (2006.01); G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical system () of telescope includes an objective lens () for collecting incident light and transmitting the incident light along a light path, and an imaging lens group () disposed on the light path that makes the optical system focus on an image plane (). The imaging lens group includes two positive lenses and two negative lenses. Each lens of the imaging lens group has a refractive index less than 1.80.