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. 13, 2003
Filed:
Jan. 18, 2002
Applicant:
Inventor:
Masami Motoyama, Chiba-ken, JP;
Assignee:
Marktec Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 2/116 ; G01N 2/184 ; G01N 2/191 ;
U.S. Cl.
CPC ...
G01N 2/116 ; G01N 2/184 ; G01N 2/191 ;
Abstract
An ultraviolet light permeable filter for an ultraviolet detection light is equipped on a filter glass surface with a dielectric multi-film layer which allows a visible radiation of wave length from 694 nm to 780 nm to reflect on the layer. The 694 nm to 780 nm wave length does not penetrate through the multi-film layer. When placed in an ultraviolet detection system, this filter prevents the occurrence of a reddish halation during inspection and display of a flaw detection light.