Patent ID: 11953709
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A system comprising:
one or both of a light emitter or a light receiver;
a reflective layer, the reflective layer including a multilayer optical film; and
a wavelength selective scattering layer, the wavelength selective scattering layer including a plurality of interconnected voids, wherein the wavelength selective scattering layer has a near-infrared scattering ratio of less than about 0.9, the near-infrared scattering ratio being a ratio of an average near-infrared scattering to an average visible scattering, and wherein the wavelength selective scattering layer has a visible reflective haze ratio of greater than about 0.5, the visible reflective haze ratio being a ratio of an average visible diffusive reflectance to an average visible total reflectance, wherein a periphery of the wavelength selective scattering layer extends beyond a periphery of one or both the light emitter and the light receiver.