Low distortion convex mirror for a vehicle rearview mirror assembly
US9340160B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2014 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Aug 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A substrate having a light reflective coating defining a mirror surface. A first curvature included on the substrate extending across the mirror surface oriented along a first axis of curvature extending heightwise. A second curvature included on the substrate extending across the mirror surface oriented along a second axis of curvature extending widthwise. The second axis of curvature is angled relative to the first axis of curvature so that the second curvature extends across the mirror surface in a helical arrangement relative to the first axis of curvature. Accordingly, angling the second axis of curvature relative to the first axis of curvature causes the first and second curvatures to cooperate in reducing distortion across the mirror surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.