Method of producing antireflective coatings on polydiethyleneglycoldiallylcarbonate, an optical product made by the method, and the use of the optical product
First Claim
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1. A method of producing a three layer antireflective transparent article, comprising:
- providing a transparent plastic substrate of polydiethyleneglycoldiallylcarbonate to define the first layer;
depositing a first coating on the substrate having a high refractive index by vaporizing an oxide mixture of substantially ZrO2 with a content of 4 to 15 weight-percent of Al2 O3 to define the second layer; and
depositing a second coating on the first coating having a low refractive index by the vaporization in a vacuum of a borosilicate glass containing less than 5 weight-percent of alkali metal oxides, to define the third layer wherein the depositing of at least the first coating is performed in an oxidizing residual gas atmosphere.
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Abstract
An optical body and a method of producing oxidic, antireflective coatings on transparent plastic substrates of polydiethyleneglycoldiallylcarbonate comprising depositing a first coating having a high refractive index by vaporizing an oxide mixture of essentially zirconium dioxide with a content of 4 to 15 weight percent of aluminum trioxide and depositing a second layer having a low refractive index by vaporizing in a vacuum a borosilicate glass containing less than 5 weight-percent of alkali metal oxides. The depositing of at least the first coating is performed in an oxidizing residual gas atmosphere.
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6 Claims
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1. A method of producing a three layer antireflective transparent article, comprising:
- providing a transparent plastic substrate of polydiethyleneglycoldiallylcarbonate to define the first layer;
depositing a first coating on the substrate having a high refractive index by vaporizing an oxide mixture of substantially ZrO2 with a content of 4 to 15 weight-percent of Al2 O3 to define the second layer; and
depositing a second coating on the first coating having a low refractive index by the vaporization in a vacuum of a borosilicate glass containing less than 5 weight-percent of alkali metal oxides, to define the third layer wherein the depositing of at least the first coating is performed in an oxidizing residual gas atmosphere. - View Dependent Claims (2, 3)
- providing a transparent plastic substrate of polydiethyleneglycoldiallylcarbonate to define the first layer;
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4. A three layer antireflective transparent optical body, consisting of a substrate of polydiethyleneglycoldiallylcarbonate to define the first layer;
- a first coat on the substrate of ZrO2 having a content of 4 to 15 weight-percent of Al2 O3 and having a first refractive index to define the second layer; and
a second coat of a borosilicate glass superposed on the first coating and containing less than 5 weight-percent of alkali metal oxides and having a second refractive index less than said first refractive index to define the third layer. - View Dependent Claims (5, 6)
- a first coat on the substrate of ZrO2 having a content of 4 to 15 weight-percent of Al2 O3 and having a first refractive index to define the second layer; and
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