Wearable near-to-eye display with unhindered primary field of view
US11506903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2022 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Mar 15, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0192
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical apparatus has an electroluminescent display energizable to emit image-bearing light along an optical axis. A reflective polarizer reflects light of a first polarization state and transmit light of a second polarization state orthogonal to the first polarization state. A quarter wave plate in the path of transmitted light of the second polarization state imparts retardance to conveyed light. A curved, partially reflective surface transmits incident light. An exit lens directs light from the curved, partially reflective surface to an exit pupil, with an eye relief of less than the focal length of an eye, wherein the optical apparatus forms an image with a field of view exceeding 40 degrees horizontally and 20 degrees vertically. The optical apparatus is configured for seating directly against the face of the viewer, to form the image peripheral to a primary field of view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.