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US 8,097,843 B2Granted
Photoluminescent markings with functional overlayers
AssigneePerformance Indicator, LLC
InventorsSatish Agrawal, Edward Kingsley
Life of this patent
Estimating the term…
Abstract
A photoluminescent marking that includes at least one functional overlayer is disclosed. The overlayer generally provides for at least one of selective filtration, reflection and absorption of wavelengths that may cause photolytic degradation of underlying photoluminescent materials. A method of fabrication is provided.
Claims18
A photoluminescent marking comprising:
- a photoluminescent layer comprising at least one type of photoluminescent material and,
- at least one functional overlayer disposed over the layer, the overlayer being adapted to selectively filter wavelengths of radiation that cause photolytic degradation of the photoluminescent material.
A photoluminescent marking comprising:
- a photoluminescent layer comprising at least one type of photoluminescent material and,
- at least one functional overlayer disposed over the layer, the overlayer being adapted to selectively filter wavelengths of radiation to enhance the daylight observability of the marking.
A method of fabricating a marking, the method comprising:
- incorporating at least one type of photoluminescent material into a layer;
- and
- applying a functional overlayer to the layer, wherein the overlayer is adapted to selectively filter wavelengths of radiation that cause photolytic degradation of the photoluminescent material.
A photoluminescent marking comprising:
- a photoluminescent layer comprising selected photoluminescent materials and,
- at least one functional overlayer disposed over the photoluminescent layer, wherein the marking emits wavelengths in the visible region of the electromagnetic spectrum and wherein the functional overlayer comprises at least one of:
- (i) selected colorant materials that adjust the daylight color of the marking to render it a stealth marking by either blending imperceptibly with the surrounding area of an object to which the marking is applied, or, when applied to objects that typically have non-photoluminescent markings for traditional usage, renders a daylight color indicative of such traditional markings, and
- (ii) selected colorant materials that increase the photolytic stability of the marking, and
- (iii) selected fluorescent materials that enhance the daylight observability of the infrared emission, and
- (iv) selected colorants to prevent the observability with the naked eye of a printed message that is printed on the photoluminescent layer or any of the functional overlayers (ii) or (iii) above.
3 more elements
Dependencies are inferred from the claim text.