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:
Oct. 17, 2000
Filed:
Nov. 20, 1998
Applicant:
Inventor:
James H Sternbergh, Webster, NY (US);
Assignee:
Luxottica Leasing S.p.A, Agordo, IT;
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351163 ; 359586 ;
Abstract
A filter and method for making a filter for enhancing a person's ability to differentiate between different shades of a spectral color of interest involves obtaining spectral data for the different shades and plotting the data on a chromaticity diagram. The standard deviation of the data is determined and a merit function based on the standard deviation is developed. Filters having positive merit functions are deemed appropriate candidates for the special purpose lens.