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. 22, 2001
Filed:
May. 03, 1999
Applicant:
Inventor:
David Gordon Norrie, Denbigh, GB;
Assignee:
Pilkington PE Limited, Denbighshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/00 ; G02B 9/16 ; G02B 1/314 ; G02B 1/318 ;
U.S. Cl.
CPC ...
G02B 1/00 ; G02B 9/16 ; G02B 1/314 ; G02B 1/318 ;
Abstract
An objective lens system,uses Germanium lens elements including a positively-powered objective lens (A), a positively-powered intermediate lens (B) and a negatively-powered field lens (C). The field lens (C) flattens the Field curvature of the system. The intermediate lens (B) corrects astigmatism and has an aspheric surface (,).
Norrie, David. (2001). Three element objective lens system using germanium lens element (U.S. Patent No. 6236501). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6236501
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile