Attenuation of Narcissus effect in pancake lens assembly
US10691198B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2017 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Nov 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pancake lens assembly includes a back optical element, a front optical element and an absorptive linear polarizer. The back optical element transmits a defined amount of light incident on a surface of the back optical element and reflects a remaining amount of the light incident on the surface of the back optical element. The front optical element is in optical series with the back optical element and positioned closer to an eye-box than the back optical element. The front optical element is configured to transmit toward the eye-box light received from the back optical element having a polarization parallel to a transmission axis of the front optical element. The absorptive linear polarizer is positioned between the front optical element and the eye-box. A transmission axis of the absorptive linear polarizer is oriented parallel to the polarization of the light being transmitted by the front optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.