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. 30, 2018
Filed:
Dec. 05, 2014
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Hideo Akiba, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/10 (2015.01); G02B 1/115 (2015.01); C03C 17/34 (2006.01); C23C 14/00 (2006.01); C23C 14/08 (2006.01); C23C 14/35 (2006.01);
U.S. Cl.
CPC ...
G02B 1/115 (2013.01); C03C 17/3452 (2013.01); C23C 14/0057 (2013.01); C23C 14/08 (2013.01); C23C 14/35 (2013.01);
Abstract
The present invention relates to an optical multilayer coating placed on or above a substrate. The optical multilayer coating includes a high-refractive index layer with a refractive index of 1.76 to 2.7, a magnesium oxyfluoride layer, and a magnesium fluoride layer. The high-refractive index layer, the magnesium oxyfluoride layer, and the magnesium fluoride layer are stacked on or above the substrate in this order and are in contact with each other. The magnesium oxyfluoride layer has a composition represented by the following formula:MgOF  (1)