Optical environmental sensor and method for the manufacturing of the sensor
AssigneeCsem Centre Suisse D'Electronique Et De Microtechnique SA—Recherche Et DéVeloppement
InventorsAlexander Stuck, Harald Walter, Marc Schnieper
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Abstract
A sensor which reacts on influences from an environment. The sensor includes a zero-order diffractive color filter. The zero-order diffractive color filter includes a high-index waveguide layer, a zero-order diffractive grating structure and a layer of an reactive material, wherein the reactive material is in contact with the environment and wherein the reactive material changes its optical properties upon interaction with the environment. The reactive material is embedded in the waveguide layer and/or the reactive material is located at a maximum distance d from the waveguide layer. The distancing is effected by an intra layer having a low index of refraction.
Claims19
A sensor reacting on influences from an environment, said sensor comprising:
- a zero-order diffractive color filter, said zero-order diffractive color filter comprising:
- a high index of refraction waveguide layer;
- a zero-order diffractive grating structure;
- and
- a layer of a reactive material, wherein said reactive material contacts said environment and said reactive material is adapted to change optical properties upon a change of said environment.
Dependencies are inferred from the claim text.