Accession Number : ADD003652
Title : Reticle-Lens System.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Hunt,Robert E ; Moore,Kenneth L
Report Date : 28 Dec 1976
Pagination or Media Count : 9
Abstract : A method of producing an optical reticle is described. A thin layer of aluminum is deposited on the face of a sapphire substrate and a reticle pattern is chemically etched therein. The system is then exposed to air at an elevated temperature for approximately one hour to oxidize the remaining aluminum layer. A film of titanium is next placed over the rough aluminum oxide as by sputtering, for example, and the excess titanium is etched away by the same pattern to produce the finished reticle.
Descriptors : *Patents, *Reticles, Optical equipment, Aluminum, Titanium, Sapphire, Substrates, Etching, Optical lenses
Subject Categories : Fabrication Metallurgy
Distribution Statement : APPROVED FOR PUBLIC RELEASE