Methods of manufacturing mirrors
AssigneeEagle Technology, LLC
InventorsTukaram HATWAR, Rebecca BORRELLI, Stephen OLIVER, James T. MOONEY
Life of this patent
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Abstract
Methods of forming a mirror by bonding a faceplate to a core structure using adhesive formulations that include fused silica particles having diameters that range between 1 to 60 micrometers with an average diameter of the silica particles being between 8 to 10 micrometers. The adhesive formulation further includes an activator including 25 to 50 weight % sodium silicate, 25 to 50 weight % sodium hydroxide and a liquid. The fused silica particles constitute 70 to 80 weight % of the adhesive formulation and the activator constitute 20 to 30 weight % of the adhesive formulation.
Claims20
A method of manufacturing a mirror, the method comprising:
- obtaining a core structure made of a material that has a coefficient of thermal expansion equal to or less than 0.5 ppm/° C.;
- obtaining a faceplate that is made of a material having a coefficient of thermal expansion of less than 0.5 ppm/° C.;
- bonding the faceplate to the core structure using an adhesive formulation that includes:
- fused silica particles having diameters that range between 1 to 60 micrometers, an average diameter of the silica particles being between 8 to 10 micrometers, the fused silica particles constituting 70 to 80 weight % of the adhesive formulation;
- and
- an activator including 25 to 50 weight % sodium silicate, 25 to 50 weight % sodium hydroxide and a liquid, the activator constituting 20 to 30 weight % of the adhesive formulation;
- and
- curing the adhesive formulation at a temperature in the range of 100 to 250° C.
Dependencies are inferred from the claim text.