Patent ID: 8963104
Filing Date: 2015-02-24
Classification: A61F,C08K,C09B,C09K,F21V,G02B,G02C,G06F,G09G

Abstract:
1. A device for improving ability to distinguish colors comprising: an optical element comprising a luminescent compound dispersed in a matrix material; wherein the optical element is sufficiently transparent to allow a person to see through the optical element; wherein the luminescent compound absorbs light at a visible absorption wavelength and emits light at a visible emission wavelength that is longer than the absorption wavelength, wherein a human cone photopigment is substantially more sensitive to the visible emission wavelength than to the visible absorption wavelength; wherein the optical element has a transmittance that is greater than 90% at the visible emission wavelength; and wherein the device is configured so that a person can better distinguish the colors by viewing an image or an object comprising the colors through the optical element.