US 12,253,827 B2
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
Martin Pinsker, Bruckberg (DE); and Tobias Solchenbach, Munich (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/774,589
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Oct. 27, 2020, PCT No. PCT/EP2020/080107
§ 371(c)(1), (2) Date May 5, 2022,
PCT Pub. No. WO2021/089362, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10 2019 130 021.5 (DE), filed on Nov. 7, 2019.
Prior Publication US 2022/0397861 A1, Dec. 15, 2022
Int. Cl. G03H 1/20 (2006.01); B29C 43/12 (2006.01); B29C 43/32 (2006.01); B29C 43/36 (2006.01); B29C 43/52 (2006.01); B29L 31/00 (2006.01); B29L 31/30 (2006.01); G03H 1/02 (2006.01)
CPC G03H 1/202 (2013.01) [B29C 43/12 (2013.01); B29C 43/3642 (2013.01); B29C 43/52 (2013.01); G03H 1/0248 (2013.01); B29C 2043/3238 (2013.01); B29C 2043/3649 (2013.01); B29C 2043/3655 (2013.01); B29L 2031/3052 (2013.01); B29L 2031/7224 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of producing a hologram on a curved substrate pane, the method comprising:
providing the curved substrate pane with a substrate surface, an actual geometry of which is subject to a variance in tolerance compared to a predetermined target geometry;
providing an inflatable cushion with a preshaped cushion surface which is shapeable by pressure and has been preshaped to the predetermined target geometry or with a predetermined variance from the predetermined target geometry;
applying a holography master in a form of a flexible thin layer to the preshaped cushion surface;
applying a hologram recording layer to the substrate surface;
pressing or laying the holography master onto the hologram recording layer by way of the preshaped cushion surface shaped to the actual geometry, thereby achieving full-area contact between holography master and the hologram recording layer with an essentially constant predetermined layer thickness of the hologram recording layer; and
exposing the hologram recording layer with a coherent light to form a hologram defined by the holography master in the hologram recording layer.