High transmittance, low emissivity coatings for substrates

Details High transmittance, low emissivity coatings for substrates High transmittance, low emissivity coatings for substrates

1992-03-27

1994-04-12

Turner, A. A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

359359, 428216, 428432, 428433, 428472, 428701, 428697, 428702, G02B 528

Patent

active

053024494

ABSTRACT:
The present invention provides a coating for a transparent substrate which exhibits a neutral color through a wide range of angles of incidence a light. The coating employs a base coat adjacent to the transparent substrate having a thickness of no more than about 275 Angstroms and may include two reflective metal layers having an intermediate layer of an anti-reflective metal oxide therebetween and an outer anti-reflective layer of metal oxide over the second reflective metal layer. If so desired, the coating of the invention may include an abrasive-resistant overcoat as its outer most layer. This overcoat is desirably formed of an abrasive-resistant metal oxide, such as zinc oxide, applied at a thickness which does not significantly affect the optical properties of said coated substrate.

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