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Optical film and method of manufacturing such optical film

A technology of optical film and base film, which is applied in the field of optical film and can solve problems such as axial light transmission loss

Pending Publication Date: 2022-04-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional optical films for privacy and light-collimation applications suffer from undesired absorption of light passing through the film on-axis, which is unavoidable due to the channel geometry.
Optical films comprising carbon black-filled microreplicated channels having a width of at least 7 to 8 micrometers (μm) and resulting in an overall loss of on-axis light transmission in the application

Method used

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  • Optical film and method of manufacturing such optical film
  • Optical film and method of manufacturing such optical film
  • Optical film and method of manufacturing such optical film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In this example, the microreplicated base film 106 was fabricated using Resin A as described in Preliminary Example 1 of WO Patent No. 2019118589 (Schmidt et al.). The raw materials used in Resin A are given in Table 1 below.

[0057] Table 1: Raw materials used for resin A

[0058]

[0059]

[0060] The composition of resin A is given below.

[0061] Material parts by weight Photomer 6010 60 SR602 20 SR601 4.0 TMPTA 8.0 PEA (Etermer 2010) 8.0 Darocur 1173 0.35 TPO 0.10 I1035 0.20

[0062] Additionally, a liner 134 is applied on the second surface 112 of the substrate 108 if the second surface 112 of the substrate 108 does not include a liner. Liner 134 may comprise laminated polytetrafluoroethylene (PTFE) tape or other good adhesion liner. In addition, an etching process is performed on the base film 106 . In one example, the base film 106 is etched by a chromic acid etching process. The etching ...

Embodiment 2

[0066] In this example, all steps mentioned in Example 1 were followed. However, the etch time of the etch process varies and no liner is placed on the substrate 108 . When examining the final product, it was observed that etch times within a predefined threshold of about 30 seconds tended to dissolve the replicated acrylate layer, resulting in an unstructured surface for the plating.

Embodiment 3

[0068] In this example, all steps mentioned in Example 1 were followed. However, no liner is disposed on the second surface 112 of the base 108 . Upon inspection of the final product, it was concluded that it may be desirable to mask the second surface 112 of the substrate 108 with a liner 134 to prevent damage caused by complete plating of the second surface 112 of the substrate 108 by a layer of an electroless metal coating. complete transmission loss.

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Abstract

A method of manufacturing an optical film includes providing a base film. The base film includes a substrate defining a first surface and a second surface. The base film further includes a plurality of structures defining an upper surface and at least one side surface extending from the corresponding upper surface to the base portion. The method further includes depositing a catalyst material on each of the plurality of structures and the base portion to form a catalyst layer thereon. The method further includes selectively removing the catalyst layer from the upper surface and the base portion of each of the plurality of structures while maintaining activity of the catalyst layer on at least one side surface of each of the plurality of structures. The method includes forming a metal layer on at least one side surface of each of the plurality of structures.

Description

technical field [0001] The present disclosure relates to optical films, and more particularly, to optical films for various optical applications and methods of making such optical films. Background technique [0002] Optical films, such as light control films (LCFs), are configured to adjust the directionality of transmitted light. Various optical films are known and generally include a light transmissive film having a plurality of channels formed from a light absorbing material. The optical film can be placed close to the display surface, image surface, or other surface to be viewed. Typically, the image being displayed can be viewed through an optical film only when the viewer is positioned within a range of angles known as the "viewing angle." In general, the viewing angle is the range of angles centered on an axis perpendicular to the surface or plane of the optical film. As the viewer's position changes such that the viewer is positioned out of view, the image being ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00
CPCG02B2207/123G02B27/0018G02B2027/012G02B27/0101B29D11/00788B29D11/00865C23C18/1689C23C18/20C23C18/31G02B5/003
Inventor 丹尼尔·M·伦茨凯文·W·戈特里克杰里米·K·拉森凯莱布·T·纳尔逊丹尼尔·J·施密特彭菲
Owner 3M INNOVATIVE PROPERTIES CO
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