SPECTRALLY SELECTIVE PANEL

摘要

The present invention disclosure provides a spectrally selective panel that comprises a first material being at least partially transmissive for light having a wavelength in the visible wavelength range and being arranged for guiding suitable light. Further, the panel comprises a diffractive element being positioned in, at or in the proximity of the first material. The diffractive element is arranged to deflect predominantly light having a wavelength in an IR wavelength band. The first material is arranged and the diffractive element is oriented such that at least a portion of energy associated with IR light incident from a transversal direction of the spectrally selective panel is directed along the panel towards a side portion of the panel.

主权项

1. A spectrally selective panel comprising:
a first material being at least partially transmissive for light having a wavelength in the visible wavelength range and being arranged for guiding suitable light, the first material comprising a luminescent material that is arranged such that a portion of IR light is absorbed by the luminescent material resulting in emission of light by photoluminescence, fluorescence or phosphorescence; a diffractive element being positioned within the first material, the diffractive element being arranged to deflect predominantly light having a wavelength in an IR wavelength band and having a plurality of grooves that are at least partially filled with a scattering material or the luminescent material; a reflective film that is arranged to reflect incident light within an IR wavelength band while being largely transmissive for at least the majority of light having a wavelength within the visible wavelength band; wherein the first material, the diffractive element and the reflective film are arranged such that at least a portion of energy associated with IR light incident from a transversal direction of the spectrally selective panel is guided within and along the panel towards a side portion of the panel.