Achromatic freeform prism for near eye displays
US10989923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2018 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Jul 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/086
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A near eye display includes a main freeform prism lens and a micro-display corrector lens, where the main freeform prism lens includes a first freeform surface, a second freeform surface, and a third freeform surface, the first freeform surface refracting a light from a micro-display into a body of the main freeform prism lens, and the main freeform prism lens having an exit pupil diameter greater than 12 millimeter (mm), and a lateral color aberration of less than 4 micrometer (um)) across a diagonal field of view (FOV), where the micro-display corrector lens is positioned between the main freeform prism lens and the micro-display, the micro-display corrector lens including a first corrector lens surface and a second corrector lens surface, and each surface of the main freeform prism lens and the micro-display corrector lens comprises a surface sag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.