Device and method for optical sensing of substances or environmental conditions

摘要: A device (10, 14) for optical sensing of substances or environmental conditions in a fluid includes number non- over lapping adjacent elements (12), each having layered element generating wavelength-specific interference effect and being treated so as to respond the presence predefined substance condition cause an optically detectable change. The are distinct from other both their corresponding As result, when is illuminated by common illumination beam multi- wave length (16, 18), spectral analysis performed on reflected transmitted enables simultaneous plurality conditions. In certain preferred implementations, at least one layer porous silicon.