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Interlayers and encapsulation layers for use with holographic optical elements

An interlayer, hologram technology

Pending Publication Date: 2022-02-11
SOLUTIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This loss reduces the refractive index gradient within the HOE film, resulting in lower reflection intensity
While covering the HOE film with a rigid crystalline or highly oriented capping layer prevents LRIC migration, mitigating the problem, such covering has been shown to often lead to other problems such as cost, HOE film wrinkling and propensity for bubble formation, as discussed previously.

Method used

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  • Interlayers and encapsulation layers for use with holographic optical elements
  • Interlayers and encapsulation layers for use with holographic optical elements
  • Interlayers and encapsulation layers for use with holographic optical elements

Examples

Experimental program
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Effect test

example

[0110] Interlayer films and laminates with constructions described and shown below can be obtained by combining individual films (different materials with different thicknesses and different types and amounts of plasticizers, such as PVB, TPU, EVA, ionomer, and other materials) ) and HOE membranes were stacked to prepare. Films or layers may also be laminated or constructed by hand lay-up methods to form multilayer interlayers, such as HOEs encapsulated by one or more polymer layers. The HOE film or layer can be any desired HOE film as previously described. The resulting interlayer may then be laminated between two sheets of annealed glass, for example each having a thickness of 2.3 mm. Lamination process All samples were laminated using a classic vacuum bag degassing followed by autoclave process, which involved: (1) assembling and placing the substrate, interlayer, and HOE film in a prescribed order in a vacuum bag; (2) at room temperature Vacuum was applied for 20 minutes...

example 1

[0114] Laminates with glass / PVB / HOE / PVB / glass structures can be fabricated using two layers of 0.38mm PVB (and standard additive package) formulated with 20 wt% 3GEH plasticizer (25phr loading) and HOE layers, where HOE The layers are encapsulated between two PVB layers. The laminate stack is then laminated in a vacuum bag degassing process followed by standard autoclave lamination processes known in the art. The completed structure will consist of a working volume hologram with a peak reflection around the originally programmed wavelength. After redistribution over the entire volume hologram layer and the entire thickness of the PVB layer encapsulating the holographic element or volume hologram, the signal intensity of the hologram will decrease due to the lower concentration of LRIC plasticizer in the HOE layer.

example 2

[0116] Laminates with a glass / TPU / HOE / TPU / glass structure can be fabricated using two layers of 0.5mm TPU formulated without LRIC plasticizer and a HOE layer, where the HOE layer is encapsulated between the two TPU layers. The laminate stack is then laminated in a vacuum bag degassing process followed by standard autoclave lamination processes known in the art. The completed structure will consist of a working volume hologram with a peak reflection around the originally programmed wavelength. After redistribution throughout the volume hologram layer and the entire thickness of the TPU layer encapsulating the holographic element or volume hologram, the signal intensity of the hologram will decrease due to the decreased concentration of the LRIC plasticizer originally contained in the HOE layer.

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Abstract

Interlayers that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The interlayers, when used in a laminate in conjunction with the HOE film, maintain and do not detract from the HOE film properties.

Description

technical field [0001] The present invention relates generally to polymeric interlayers for encapsulating and protecting holographic optical elements and laminates comprising these interlayers. More specifically, the present invention relates generally to polymeric interlayers, and laminates comprising the polymeric interlayer and at least one layer comprising a holographic optical element. Background technique [0002] Typically, a multilayer glass pane comprises a laminate consisting of an interlayer or interlayer or interlayers sandwiched between two glass panes. In some applications, a laminate may include only one glass pane or other rigid substrate. Laminated multilayer glass panels are commonly used in architectural window applications, transportation vehicles (including cars, trucks, trains, ships, aircraft) and photovoltaic solar panels. The multilayered glass panels used in the first two applications are often referred to as laminated safety glass. Generally, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/40B32B27/32B32B27/28B32B23/20B32B23/04B32B17/00B32B17/06G02B5/32
CPCB32B27/306B32B27/40B32B27/32B32B27/308B32B27/283B32B23/20B32B23/04B32B17/00B32B17/06G02B5/32B32B2551/00B32B17/10036B32B17/10605B32B2457/20B32B17/10633B32B17/10651B32B17/10935B32B17/10005B32B2367/00B32B2323/04B32B7/023B32B17/10761B32B17/1077B32B17/10798B32B2307/40B32B2307/409B32B2307/418B32B2250/05B32B2250/40G03H1/0248G03H1/0252G03H2001/0264G03H2260/12
Inventor 弗朗索瓦·安德烈·科兰约翰·约瑟夫·德埃里克史蒂文·V·海德曼
Owner SOLUTIA INC