Transparent film for face protection shield
US10575572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2015 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Jan 2, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2551/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a transparent film for a face protection shield in which transparency is enhanced and visibility from a non-wearer is also enhanced, the transparent film for a face protection shield including: a transparent base material having flexibility; and a transparent resin layer configured to be laminated on at least one of surfaces of the transparent base material, the transparent resin layer having on a surface a plurality of structural bodies including concavities or convexities provided at a pitch of less than or equal to a visible light wavelength. A refractive index of the transparent base material is different from a refractive index of the transparent resin layer, and an interface between the transparent base material and the transparent resin layer has a concave-convex shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.