Waveguides with improved intensity distributions
US10067347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2016 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jun 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for use in replicating an image associated with an input-pupil to an output-pupil, comprises an optical waveguide including input-coupler, one or more intermediate-components and an output-coupler. The input-coupler couples light corresponding to the image into the optical waveguide and diffracts the light corresponding to the image in at least two different directions so that light corresponding to the image is diffracted toward each of the one or more intermediate-components. The intermediate-component(s) is/are configured to individually or collectively perform both odd-order pupil expansion and even-order pupil expansion on light corresponding to the image that travels from the input-coupler to the one or more intermediate-components by way of TIR, and diffract the light corresponding to the image towards the output-coupler. The output-coupler is configured to couple the light corresponding to the image out of the optical waveguide so that the light corresponding to the image is viewable from the output-pupil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.