Patent ID: 6042934
Filing Date: 2000-03-28
Classification: B32B,C03C,Y10S,Y10T

Abstract:
An article comprising a transparent rigid substrate having multiple thin layers thereon comprising successively:i) a first dielectric material layer on said substrate;ii) a first layer having infrared reflection properties on said layer i);iii) a second dielectric material layer on said layer ii);iv) a second layer having infrared reflection properties on said layer iii); andv) a third dielectric material layer on said layer iv);wherein a thickness of said first layer having infrared reflection properties is 50 to 64% of that of said second layer having infrared reflection properties; andwherein the first dielectric material layer has an optical thickness which is greater than an optical thickness of the third dielectric material layer; said optical thickness of said first layer corresponding to at least 110% of the optical thickness of said third layer; andfurther wherein said transparent substrate having multiple thin layers thereon exhibits an external reflection color in the range of blue to blue-green at both 0.degree. C. and 60.degree. C. incidence angles.