Windows with photoluminescent lighting

A system, comprising:

• a body;
• a window in the body, wherein the body and the window separate an interior region from an exterior region, wherein the window contains a thin-film interference filter, a waveguide, and a polymer coating with photoluminescent material, wherein the thin-film interference filter is located on an outermost surface of the window facing the interior region, wherein the waveguide comprises a core surrounded by a cladding, and wherein the polymer coating is interposed between the core and the cladding and has a refractive index that matches a refractive index of one of:
• the core and the cladding;
• and
• an ultraviolet light source configured to emit ultraviolet light into the waveguide that pumps the photoluminescent material and causes the photoluminescent material to luminesce and provide visible light illumination to the interior region, wherein the visible light illumination has a yellowish color cast and wherein the thin-film interference filter comprises an ultraviolet-light-blocking filter having a blue color cast to compensate for the yellowish color cast.

A window, comprising:

• an outer glass layer;
• an inner glass layer;
• a waveguide between the outer glass layer and the inner glass layer, wherein the waveguide includes a core surrounded by cladding material, wherein the cladding material comprises photoluminescent material and is in contact with the core, wherein the photoluminescent material comprises a first photoluminescent material that is excited by a first range of ultraviolet wavelengths and a second photoluminescent material that is excited by a second range of ultraviolet wavelengths that is different from the first range of ultraviolet wavelengths;
• a light source configured to emit ultraviolet pump light into the core, wherein the ultraviolet pump light is tunable between the first range of ultraviolet wavelengths and the second range of ultraviolet wavelengths, wherein the core guides the ultraviolet pump light to the photoluminescent material via total internal reflection, wherein the cladding material confines the ultraviolet pump light within the core, and wherein the ultraviolet pump light pumps the photoluminescent material so that the photoluminescent material emits visible light illumination that passes through the inner glass layer;
• a first ultraviolet-light-blocking filter on the outer glass layer;
• and
• a second ultraviolet-light-blocking filter on the inner glass layer, wherein at least one of the first and second ultraviolet-light-blocking filters is a thin-film interference filter that has a blue color cast to offset a yellow color cast in the visible light illumination.