| 摘要 |
This invention relates to transparent glass window structures of the type bearing a first coating 6 of infra-red reflective material, which is advantageously less than about 0.85 microns in thickness, wherein the observance of iridescence resulting from such a first coating is markedly reduced by the provision of a layer 4 of continuously varying refractive index between the glass 2 and the coating 6, such that the refractive index increases continuously from the glass to the first coating, thereby preventing the observation of iridescence. The coatings are applied by passing the substrate through a reaction zone in parallel with a reactive gas mixture which contains components for forming the two coatings, wherein the reaction to form the first coating proceeds more rapidly. A particular advantage of the invention is its efficacy with clear and lightly tinted glasses wherein the problem of iridescent color has had its greatest commercial impact. <IMAGE> |
