Reflectance paper explained

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.

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 and References

  1. Web site: Group . SAE Media . Reflectance Paper' Can Reflect Light Like Physical Object . 2024-04-14 . www.techbriefs.com . en.
  2. Web site: Brian . Dodson . Reflectance paper displays photographs in a new light . Gizmag.com . 2012-08-21 . 2012-08-27 .
  3. Web site: Wallace . John . SIGGRAPH: Images printed on 'reflectance paper' reflect light like 3D objects . Laser Focus World . 2012-08-14 . 2012-09-06 .