Identification document with contoured surface image
A multilayer laminate identification document including an outer layer having a contoured surface image formed therein via laser ablation. The contoured surface image has contours based on a digital monochrome image, and has a first appearance when viewed in reflected light at a first angle and a second, different appearance when viewed in reflected light at a second, different angle. The multilayer laminate identification document is formed by generating a second digital monochrome image with continuous pixel patterns from a first digital monochrome image, and irradiating the surface of the identification document with a laser using the second digital monochrome image as a guide to form a contoured surface image in the surface of the identification document.
1. A multilayer laminate identification document comprising:
an outer layer comprising a contoured surface image formed via laser ablation and having contours based on a digital monochrome image, wherein the contoured surface image has a first appearance when viewed in reflected light at a first angle and a second, different appearance when viewed in reflected light at a second, different angle; and
an inner layer having a source image printed thereon, wherein the digital monochrome image is derived from the source image, and the contoured surface image partially overlaps the source image wherein the source image is a digital polychrome portrait of a subject.
2. The identification document of claim 1 , wherein the contoured surface image is perceptible by touch.
3. The identification document of claim 1 , wherein the contours of the contoured surface image do not appear pixelated to the unaided human eye.
4. The identification document of claim 1 , wherein the contours are continuous, and correspond to contiguous pixels in the digital monochrome image.
5. The identification document of claim 1 , wherein the contoured surface image defines a depression in the outer layer.