Translucent, transparent, or semi-translucent microlens sheetings with composite images are disclosed, in which a composite image floats above or below the sheeting, or both. The composite image may be two-dimensional or three-dimensional. The sheeting may have at least one layer of material having
Translucent, transparent, or semi-translucent microlens sheetings with composite images are disclosed, in which a composite image floats above or below the sheeting, or both. The composite image may be two-dimensional or three-dimensional. The sheeting may have at least one layer of material having a surface of microlenses that form one or more images at positions internal to the layer of material, at least one of the images being a partially complete image. Additional layers, such as retroreflective, translucent, transparent, or optical structure layers may also be incorporated into the sheeting.
대표청구항▼
We claim: 1. A sheeting comprising: a layer of material having a surface of microlenses that form one or more images at positions internal to the layer of material, wherein at least one of the images is a partially complete image, and each of the images is associated with a different one of the mic
We claim: 1. A sheeting comprising: a layer of material having a surface of microlenses that form one or more images at positions internal to the layer of material, wherein at least one of the images is a partially complete image, and each of the images is associated with a different one of the microlenses, and wherein the microlenses have refractive surfaces that transmit light to positions within the layer of material to produce a composite image from the images formed within the layer of material so that the composite image appears to float above the sheeting, float below the sheeting, or float in the plane of the sheeting. 2. The sheeting of claim 1, wherein the layer of material has a thickness that exceeds a focal length of the microlenses so that a focus point of an energy source applied to the sheeting is located within the layer of material. 3. The sheeting of claim 1, wherein the images within the layer of material comprise photodegradation portions of the layer of material. 4. The sheeting of claim 1, wherein the layer of material has a thickness between 20-100 μm. 5. The sheeting of claim 1, further comprising one or more translucent layers disposed adjacent to the layer of material. 6. The sheeting of claim 5, wherein at least one of the translucent layers comprises an optical structure layer. 7. The sheeting of claim 5, wherein at least one of the translucent layers comprises a diffractive grating. 8. The sheeting of claim 1, wherein the microlenses cause the composite image to appear to move relative to the sheeting as a viewing position changes relative to the sheeting. 9. The sheeting of claim 1, wherein the layer of material has a thickness sufficient to be self-supporting without requiring a substrate. 10. The sheeting of claim 1, wherein the composite image is a two-dimensional image or a three-dimensional image. 11. The sheeting of claim 1, wherein the sheeting is applied to a security document. 12. A sheeting comprising: a single layer of material having microlenses formed on a first side and a retroreflective portion formed on a second side opposite the microlenses, wherein the layer of material includes one or more images formed between the microlenses and the retroreflective portion, and wherein the microlenses produce a composite image that appears to float above the sheeting, float below the sheeting, or float in the plane of the sheeting. 13. The sheeting of claim 12, wherein the retroflective portion and the microlenses comprise two separate layers laminated together. 14. The sheeting of claim 12, wherein the microlenses extends over at least a portion of the first side of the layer of material, and wherein the retroreflective portion extends over substantially all of the second side of the layer of material. 15. The sheeting of claim 12, wherein the retroreflective portion comprises an array of corner cubes. 16. A sheeting comprising: a layer of material having a surface of microlenses; a retroreflective layer; and a radiation-sensitive layer disposed between the layer of material and the retroreflective layer, wherein the radiation-sensitive layer includes one or more images formed between the layer of material and the retroreflective portion, and wherein the microlenses produce, from the images of the radiation-sensitive layer, a composite image that appears to float above the sheeting, float below the sheeting, or float in the plane of the sheeting. 17. A sheeting having first and second sides, comprising: a first layer of material having a surface of microlenses; and a second layer of material having a surface of microlenses disposed proximate to the first layer, wherein one or more images are formed within the sheeting at locations between the microlenses of the first layer and the microlenses of the second layer, wherein at least one of the images is a partially complete image, wherein each image is associated with one of a plurality of microlenses of the first layer, wherein the microlenses have refractive surfaces that transmit light to positions within the sheeting to produce a composite image from the images that appears to float above the sheeting, float below the sheeting, or float in the plane of the sheeting, and wherein the microlenses of the first layer and the microlenses of the second layer are aligned such that the composite image can be viewed from both the first side and the second side of the sheeting. 18. The sheeting of claim 17, further comprising a transparent radiation sensitive layer between the first layer of material and the second layer of material, wherein the images are formed within the transparent radiation sensitive layer. 19. The sheeting of claim 17, wherein the images are formed within one of the first layer of material and the second layer of material. 20. A sheeting having first and second sides, comprising: a single layer of material having a first surface of microlenses and a second surface of microlenses formed opposite the first surface of microlenses, wherein the single layer of material includes one or more images formed internally to the single layer of material, and wherein, from the images, the first surface of microlenses and the second surface of microlenses produce a composite image that can be viewed from both the first side and the second side of the sheeting.
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