Method for Producing a Hologram on a Curved Substrate Plate, Resulting Substrate Plate With Hologram and a Laminate, in Particular a Vehicle Windscreen, Containing Said Substrate Plate
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United States of America Patent
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Issued Date -
Dec 15, 2022
app pub date -
Oct 27, 2020
filing date -
Oct 27, 2020
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Abstract
A method for producing a hologram on a curved substrate plate includes providing a curved substrate plate having a substrate surface, the actual geometry of which is subject to a tolerance deviation with respect to a predetermined desired geometry; providing an inflatable cushion with a cushion surface that can be deformed under the effect of pressure and is preformed into the predetermined desired geometry or with a predetermined deviation therefrom; applying a holographic master in the form of a flexible thin layer to the deformable cushion surface and applying a hologram-recording layer to the substrate surface; pressing or placing the holographic master onto the hologram-recording layer by way of the cushion surface deformed to the actual geometry, thereby achieving full surface-area contact between them with a substantially constant predetermined layer thickness of the hologram-recording layer, and exposing the hologram-recording layer to form a hologram.
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