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:
Jul. 17, 1979
Filed:
Dec. 21, 1977
Applicant:
Inventor:
Gerhard Kienel, Hanau, DE;
Assignee:
Leybold-Heraeus GmbH & Co. KG, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
428213 ; 350164 ; 3501 / ; 351166 ; 427164 ; 4272 / ; 428432 ; 428522 ;
Abstract
An optical body and a method of producing same comprising a transparent plastic substrate composed of an acrylate, preferably polymethylmethacrylate, depositing a first coat having a high refraction index on the substrate by vaporizing an oxide mixture of substantially zirconium dioxide with a content of 4 to 15 percent weight percent of aluminum oxide and depositing a second coat having a low refractive index by devaporization in a vacuum of a borosilicate glass containing less than 5 weight-percent of alkali metal oxides. The application of at least the first coat is performed in an oxidizing residual gas atmosphere.