Calibrating heads-up display using infrared-responsive markers
US12418643B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2024 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Oct 31, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/014
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system includes an infrared (IR) light source(s); IR camera(s); an optical combiner, wherein a set of IR-responsive markers are located in at least one of: (i) within the optical combiner, (ii) on a semi-reflective surface of the optical combiner; and processor(s) configured to: control the IR camera(s) to capture IR image(s) of the optical combiner, whilst controlling the IR light source(s) to emit IR light towards the optical combiner; detect at least a subset of the set of IR-responsive markers in the IR image(s); for a given IR-responsive marker detected in the IR image(s), determine a deformation in a shape of the given IR-responsive marker with respect to a reference shape; and determine a curvature of the optical combiner, based on respective deformations in shapes of IR-responsive markers in at least said subset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.