Methods of fabrication of compound light-guide optical elements having embedded coupling-in reflectors
US11886008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2022 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Apr 11, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A stack has first and second faces and multiple LOEs that each has two parallel major surfaces and a first plurality of parallel internal facets oblique to the major surfaces. A first block has third and fourth faces and a second plurality of parallel internal facets. The first block and the stack are bonded such that the second face joins the third face and the first and second facets are non-parallel, forming a second block. The second block is cut at a plane passing through the first face, forming a first structure having an interfacing surface. A third block has fifth and sixth faces and a plurality of parallel internal reflectors. The third block and the first structure are bonded such that fifth face joins the interfacing surface and the internal reflectors are non-parallel to all the facets, forming a second structure. Compound LOEs are sliced-out from the second structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.