SAW modulators with phase and angle selective optical coatings
US11054676B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 25, 2018 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | May 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/21
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system and method for improving spatial light modulator (SLM) devices such as Surface Acoustic Wave (SAW) modulators are disclosed. The SAW modulators can improved angular bandwidth and suppress unwanted diffractive orders. In one example, a coating layer(s) is applied to a proximal face of the SAW modulator to improve coupling of guided modes into leaky modes. Additionally, applying coating layers(s) such as a hybrid anti-reflective/highly reflective coating to an exit face of the SAW modulator can suppress transmission of undesired diffractive order(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.