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:
Apr. 25, 1978
Filed:
Jan. 22, 1976
Michael Jay Minot, Corning, NY (US);
Ugur Ortabasi, Corning, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
An antireflective layer is formed on a surface of a body of phase separable glass by heat treating the glass to cause it to become separated into at least two distinct phases of different solubility. A surface of the body is subjected to a leaching solution which preferentially leaches at least the most soluble phase, leaving a surface layer consisting of a skeletal structure that comprises the least soluble phase. The leaching solution preferaby contains an acid which etches the skeletal structure which becomes so modified that the film exhibits an effective refractive index gradient thereacross, the film therefor exhibiting antireflectance properties over a wide band of wavelengths.