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:
Jul. 23, 2002
Filed:
Nov. 30, 2000
Applicant:
Inventor:
Anthony John Kirkham, St Asaph, GB;
Assignee:
Pilkington PE Limited, St. Asaph, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/514 ;
U.S. Cl.
CPC ...
G02B 1/514 ;
Abstract
A dual field-of-view objective system ( ) which is inexpensive, has high transmission and is essentially achromatized and athermalized. The system ( ) uses a silicon front lens A and all lens elements have positive temperature/refractive index change coefficient.