Diffractive optical elements for wide field-of-view virtual reality devices and methods of manufacturing the same
US10845609B2 · kind B2 · utility
1Cited by
1References
22Claims
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Key dates
| Filing date | Jun 28, 2018 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0127
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Diffractive optical elements for wide field-of-view virtual reality devices and methods of manufacturing the same are disclosed. An example apparatus includes a substrate and a thin film stack including alternating layers of a first material and a second material. The thin film stack defines an annular protrusion. The annular protrusion has a stair-like profile. Top surfaces of separate ones of steps in the stair-like profile correspond to top surfaces of separate ones of the layers of the second material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.