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:
Mar. 09, 1999
Filed:
Jun. 20, 1997
Applicant:
Inventors:
Etienne Quesnel, Meylan, FR;
Jean-Yves Robic, Grenoble, FR;
Bernard Rolland, Meylan, FR;
Jean Dijon, Champagnier, FR;
Assignees:
Commissariat a l'Energie Atomique, Paris, FR;
Etat Francais, Armees, FR;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428688 ; 428689 ; 428699 ; 4289122 ; 428913 ;
Abstract
The invention relates to a multilayer stack of fluoride materials usable in optics and its production process. This stack is constituted by alternating layers of a first, high index, fluoride material such as YF.sub.3 and a second, low index fluoride material such as LiF, able to form together a specific, stable compound such as YLiF.sub.4, so that the interface between two adjacent layers of the stack is at least partly formed from said compound.