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. 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.
History
In 2012, researchers at the
University of California, Santa Cruz
The University of California, Santa Cruz (UC Santa Cruz or UCSC) is a public university, public Land-grant university, land-grant research university in Santa Cruz, California, United States. It is one of the ten campuses in the University of C ...
,
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 50
μm, 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.
Notes
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Digital photography
Science of photography
Optical materials