公开(公告)号：US20190219743A1

公开(公告)日：2019-07-18

申请号：US16156079

申请日：2018-10-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tri D. Pham ,  Steven H. Kong ,  Haiyan Zhang ,  Joseph T. Aronson ,  Michael R. Leaf ,  Gary T. Boyd ,  Nicholas A. Johnson ,  Qingbing Wang

IPC: G02B5/02 ,  B29C59/02 ,  C25D5/16 ,  C25D3/04 ,  C25D3/38 ,  C25D5/12 ,  F21V8/00

CPC classification number: G02B5/021 ,  B29C59/026 ,  B29L2011/00 ,  C25D3/04 ,  C25D3/38 ,  C25D5/12 ,  C25D5/16 ,  G02B5/0221 ,  G02B5/0268 ,  G02B5/0278 ,  G02B6/0051 ,  G02F1/133606

Abstract: Optical diffusing films are made by microreplication from a structured surface tool. The tool is made using a 2-part electroplating process, wherein a first electroplating procedure forms a first metal layer with a first major surface, and a second electroplating procedure forms a second metal layer on the first metal layer, the second metal layer having a second major surface with a smaller average roughness than that of the first major surface. The second major surface can function as the structured surface of the tool. A replica of this surface can then be made in a major surface of an optical film to provide light diffusing properties. The structured surface and/or its constituent structures can be characterized in terms of various parameters such as optical haze, optical clarity, Fourier power spectra of the topography along orthogonal in-plane directions, ridge length per unit area, equivalent circular diameter (ECD), and/or aspect ratio.

公开(公告)号：US10295710B2

公开(公告)日：2019-05-21

申请号：US14443407

申请日：2013-11-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tri D. Pham ,  Steven H. Kong ,  Haiyan Zhang ,  Joseph T. Aronson ,  Michael R. Leaf ,  Gary T. Boyd ,  Nicholas A. Johnson ,  Qingbing Wang

IPC: G02B5/02 ,  F21V8/00 ,  B29C59/02 ,  C25D3/04 ,  C25D3/38 ,  C25D5/12 ,  C25D5/16 ,  G02F1/1335 ,  B29L11/00

Abstract: Optical diffusing films are made by microreplication from a structured surface tool. The tool is made using a 2-part electroplating process, wherein a first electroplating procedure forms a first metal layer with a first major surface, and a second electroplating procedure forms a second metal layer on the first metal layer, the second metal layer having a second major surface with a smaller average roughness than that of the first major surface. The second major surface can function as the structured surface of the tool. A replica of this surface can then be made in a major surface of an optical film to provide light diffusing properties. The structured surface and/or its constituent structures can be characterized in terms of various parameters such as optical haze, optical clarity, Fourier power spectra of the topography along orthogonal in-plane directions, ridge length per unit area, equivalent circular diameter (ECD), and/or aspect ratio.