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:
May. 02, 1978
Filed:
Jan. 17, 1977
Applicant:
Inventors:
John N Lee, Silver Spring, MD (US);
Robert B Oswald, Jr, Bethesda, MD (US);
Assignee:
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; A61K / ;
U.S. Cl.
CPC ...
2504 / ; 250510 ; 3502 / ;
Abstract
A method for producing durable optical baffling materials comprising poling to a mirror finish the surface of a starting material, preferably having a very fine-grained structure, and then bombarding the surface of the starting material with low energy (0 to 50 keV) pulsed electrodes at a pulse length of about 0.1 microseconds. A fluence of 0.5 cal/cm.sup.2 renders the surface completely black in appearance, retaining none of its initial mirror-like properties.