Imaged medium comprising sensor-readable indicia
First Claim
1. An article comprising a layer containing an image visible to the human eye under normal viewing conditions, the image containing layer having a surface on which is applied data comprising greater than 500 pixels per square inch formed by an IR dye that forms a sensor readable differential light pattern when illuminated, said dye being substantially invisible to the human eye under normal viewing conditions;
- wherein the light absorbance of at least a portion of the surface of the layer comprising said image and underlying said data is different from the light absorbance of the dye comprising the data under the conditions in which the data is read.
9 Assignments
0 Petitions
Accused Products
Abstract
This invention provides a method of storing encoded data on an article comprising applying said data on a surface of the article, as an encodement invisible to the human eye under normal viewing conditions. The invention also provides materials for use in said method.
This invention comprises an article having on a surface thereof data represented by a material applied to the article that forms a differential light pattern when illuminated which is capable of being read by a sensor capable of detecting said differential light pattern, said material being substantially invisible to the human eye under normal viewing conditions;
wherein the light absorbance of at least a portion of the surface of the article underlying said data is different from the absorbance of the material comprising the data under the conditions in which the data is read.
-
Citations
16 Claims
-
1. An article comprising a layer containing an image visible to the human eye under normal viewing conditions, the image containing layer having a surface on which is applied data comprising greater than 500 pixels per square inch formed by an IR dye that forms a sensor readable differential light pattern when illuminated, said dye being substantially invisible to the human eye under normal viewing conditions;
wherein the light absorbance of at least a portion of the surface of the layer comprising said image and underlying said data is different from the light absorbance of the dye comprising the data under the conditions in which the data is read. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
Specification