Substrate-guided wave-based transparent holographic center high mounted stop light and method of fabrication thereof
US10452025B2 · kind B2 · utility
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Key dates
| Filing date | May 5, 2014 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Jan 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Multiple pairs of substrate-guided wave-based holograms (SGWHs) are laminated to a common thin substrate to form a transparent substrate-guided wave-based holographic CHMSL (SGWHC) that diffracts playback LED illumination over a wide angular range. This device is made pursuant to a technique that includes the steps of recording a first set of SGWHs with one setup, that upon playback, will couple and guide the diffracted light inside the substrate, and a second set of SGWHs recorded with another setup, that will diffract and couple the guided light out.
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