Optical assembly with switchable waveplates
US10955672B1 · kind B1 · utility
6Cited by
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20Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 25, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Sep 25, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical assembly includes at least one switchable waveplate and a reflective polarizer layer. The reflective polarizer layer is configured to pass a first polarization orientation of display light and reflect a second polarization orientation orthogonal to the first polarization orientation. The optical assembly provides a first effective focal length when the switchable waveplate is switched to a first retardance value and the optical assembly provides a second effective focal length when the switchable waveplate is switched to a second retardance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.