Optical body, window material, and roll screen
US10858883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2017 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Jun 27, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2417
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An optical body includes a first optical transparent layer having quadrangular pyramid-shaped depressions, a wavelength-selective reflecting layer formed on the depressions and selectively reflecting light of a specific wavelength band, and a second optical transparent layer formed on the wavelength-selective reflecting layer. When (θ, ϕ) is taken as the incident angle (θ: angle between perpendicular line relative to second optical transparent layer acting as incident surface and light incident on incident surface; ϕ: angle between specific straight line within incident surface and component resulting from projection of incident light on incident surface), with respect to incident light that is incident on the incident surface from different ϕ directions at θ=60°, the optical body has an average reflection angle of reflected light to the same quadrant as the incident light of 30° or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.