Physics:Reflectance paper
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Reflectance paper is a surface that contains a lattice of mirrored dimples.
Design
The paper is printed with color and the angle-dependent reflectance function for each pixel of an image captured with a light field camera such as a Lytro. [1] The image displays differently depending on the angle of incident light in the viewing environment. This technique can be used to display the image of a sculpture with its direction-dependent shadow depending on the angle of the light.[2]
History
In 2012, researchers at the University of California, Santa Cruz, Hewlett-Packard Laboratories and 3M created the first type of this kind of paper using a hexagonal lattice of millimeter-sized dimples. Dimple depth was 50μm, representing 70% of a hemisphere. Mirroring used silver or sputtered aluminum. A 32×32 matrix of light-field information was printed on a transparent mask over the dimples.[2][3]
Notes
- ↑ Group, SAE Media. "Reflectance Paper' Can Reflect Light Like Physical Object" (in en). https://www.techbriefs.com/component/content/article/30363-printing-reflectance-functions.
- ↑ 2.0 2.1 Dodson, Brian (2012-08-21). "Reflectance paper displays photographs in a new light". Gizmag.com. http://www.gizmag.com/reflectance-paper-3d-photographic-prints/23734/. Retrieved 2012-08-27.
- ↑ Wallace, John (2012-08-14). "SIGGRAPH: Images printed on 'reflectance paper' reflect light like 3D objects". Laser Focus World. http://www.laserfocusworld.com/articles/2012/08/siggraph-images-printed-on-reflectance-paper-reflect-light-like-3d-objects.html. Retrieved 2012-09-06.
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