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. 05, 1999
Filed:
Jun. 10, 1997
Applicant:
Inventor:
Takeshi Shirai, Kanagawa, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359359 ; 359589 ;
Abstract
Anti-reflective coatings for use on an optical substrate are disclosed having a low reflectance over a broad band of wavelengths in the ultraviolet range and exhibiting excellent 'laser durability.' The anti-reflective coatings comprise a layer of high-refractive index material situated between at least two layers of low-refractive index material. The layers of high- and low-refractive index material are laminated onto an optical substrate, such as glass or quartz. The anti-reflective coating minimizes the loss of light due to flares, ghosts, etc. Additionally, reflections are reduced over a broad range of incidence angles.