Vacuum mold apparatus, systems, and methods for forming curved mirrors
US11550148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2018 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Dec 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/013
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of forming a curved mirror for a heads-up display includes providing a mirror preform including a first major surface, a second major surface, and a minor surface connecting the first and second major surfaces. The minor preform has a central portion and a peripheral portion surrounding the central portion. The method includes disposing the minor preform on a mold having a concave surface facing the second major surface and within a housing that surrounds at least a portion of the minor surface, a space being defined between the concave surface and the second major surface with a perimeter of the space being bounded by the housing, the mold comprising a ditch-type vacuum line along a periphery of the concave surface underneath the peripheral portion. The method also includes providing vacuum pressure to the space via the ditch-type vacuum line to conform the mirror preform to the concave surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.