Method of fabricating a light-guide optical element
US12135445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2020 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Oct 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of fabricating a light-guide optical element having a plurality of partially reflecting surfaces is disclosed. The method includes providing a plurality of transparent plates, each plate polished on two opposite surfaces such that the surfaces are parallel to each other, coating a first of the surfaces of a subset of plates with a first coating, coating a second of the surfaces of the subset of plates with a second coating; bonding together the plurality of transparent plates to form a stack, and cutting the stack along parallel planes obliquely angled to the faces of the transparent plates so as to form the optical element, wherein the first coating is a partially reflective coating have a first set of mechanical properties, and the second coating is selected from the group consisting of: a coating similar to the first coating and a non-reflective coating having a second set of mechanical properties substantially similar to the first set of mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.