Method for Producing a Curved Substrate Panel with a Hologram, Resulting Substrate Panel with Hologram and a Laminate Containing Such a Substrate Panel, in Particular a Vehicle Window

Patent metadata

Field	Value
Publication number	US-2022382211-A1
Application number	US-202017775776-A
Country	US
Kind code	A1
Filing date	Oct 13, 2020
Priority date	Nov 11, 2019
Publication date	Dec 1, 2022
Grant date	—

Abstract

A method for producing a curved substrate panel with a hologram includes producing a curved substrate panel from plastic by forming, injection moulding or injection-compression molding between a first mold half, which defines a predetermined desired geometry of a substrate surface, and a second mold half removing the first mold half from the second mold half and applying a holographic master to a surface of the first mold half, or of a further mold half fixing the first mold half or further mold half on the second mold half such that an empty gap of a predetermined constant thickness remains between the holographic master and the substrate surface, and filling this gap with a hologram-receiving material; and exposing the hologram-receiving layer formed between the substrate surface and the holographic master with a coherent light for forming a hologram defined by the holographic master.

First claim

1 .- 7 . (canceled)

8 . A method of producing a curved substrate pane having a hologram, the method comprising:
producing the curved substrate pane from plastic by primary forming, injection molding or injection compression molding between a first mold half that defines a predetermined target geometry of a substrate surface and a second mold half separably fixed to the first mold half; removing the first mold half from the second mold half in which the curved substrate pane remains, and applying a holography master in a form of a thin layer to a surface defining the target geometry in the first mold half or a further mold half; fixing the first mold half or the further mold half having the holography master on the second mold half to leave an empty gap of a predetermined constant thickness between the holography master and the substrate surface, and filling the gap with a hologram recording material; and exposing a hologram recording layer formed thereby between the substrate surface and the holography master with a coherent light to form the hologram, wherein the hologram is defined by the holography master.

9 . The method according to claim 8 , wherein the hologram is a holographic optical element.

10 . The method according to claim 8 , wherein the hologram recording material is a liquid photopolymer.

11 . The method according to claim 8 , wherein
the exposing of the hologram recording layer is conducted in a closed state of the mold in which the curved substrate pane is fixed between the mold halves that are fixed to one another.

12 . The method according to claim 11 , wherein
exposure elements are integrated in at least one of the first mold half, the second mold half, or the further mold half, wherein the exposure elements are configured to expose the hologram recording layer with the coherent light to form the hologram defined by the holography master.

13 . The method according to claim 12 , wherein
the exposure elements comprise at least one of optical fibers or optical elements.

14 . The method according to claim 8 , wherein
the curved substrate pane, after the hologram recording material has been introduced into the gap formed between the substrate surface and the holography master, is held or fixed in a hologram recording position with respect to the first mold half or the further mold half, while the second mold half is removed from a reverse side of the curved substrate pane, and the exposing of the hologram recording layer is conducted in the hologram recording position through the curved substrate pane by way of a light source disposed at or behind the reverse side of the curved substrate plane.

15 . A curved substrate pane produced by the method according to claim 8 .

16 . The curved substrate plane according to claim 15 , wherein the hologram is a volume hologram.

17 . A composite pane comprising:
the curved substrate pane according to claim 15 as a first pane of the composite pane; and a second pane bonded to the first pane by a bonding layer, wherein the hologram is formed on a surface of the first pane facing the second pane.

18 . The composite pane of claim 17 , wherein the bonding layer is composed of PVB.

19 . A vehicle comprising:
a vehicle windowpane at least partly formed by the composite pane according to claim 17 , wherein the first pane is an inner pane of the vehicle windowpane lying closer to or directly adjoining a vehicle interior, and the second pane is an outer pane of the vehicle windowpane lying closer or directly adjoining an exterior environment of the vehicle.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Pinsker Martin
• Solchenbach Tobias

Classifications

• B29C33/424

  Moulding surfaces provided with means for marking or patterning (for injection moulding B29C45/372) · CPC title

• B29C2045/565

  Closing of the mould during injection · CPC title

• G02B27/0103

  comprising holographic elements · CPC title

• G03H2270/21

  Curved bearing surface · CPC title

• B29C37/0028

  In-mould coating, e.g. by introducing the coating material into the mould after forming the article · CPC title