Apochromatic pancharatnam berry phase (PBP) liquid crystal structures for head-mounted displays
US10451947B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Mar 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Pancharatnam Berry Phase (PBP) liquid crystal structure for adjusting or focusing light of a plurality of color channels emitted by a display of a head-mounted display (HMD) comprises a plurality of PBP active elements. Each PBP active element of the structure is configured to act as a half waveplate for light of a corresponding color channel, such that light of the corresponding color channel is adjusted by a predetermined amount. In addition, each PBP active element acts as a one waveplate for light of the remaining color channels, such that light of the remaining color channels passes through the PBP active element substantially unaffected. As such, the PBP structure is able to adjust incident light of the plurality of color channels uniformly in an apochromatic fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.