Composite optical membrane including anti-reflective coating

G - Physics – 02 – B

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G02B 1/10 (2006.01) G02B 1/11 (2006.01)

Patent

CA 1274996

Abstract of the Disclosure A plural-layer, composite, high-transmissivity, optical element with a two-layer, organic, anti-reflective coating. The element includes a base layer, an intermediate layer formed of an organic material which is joined to and distributed over a face in the base layer, and a third layer formed of another organic material which is joined to and distributed over the exposed face in the intermediate layer. The intermediate and third layers cooperatively form the anti- reflective coating. All layers are prepared by spin casting. The solvent used in preparing the intermediate layer is chosen to be one which will not dissolve the base layer, and the solvent used in preparing the third layer is chosen to be one which will not dissolve either the intermediate layer or the base layer.

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