FIGURE 3. Image processing, hologram recording and display.
From the following article:
An updatable holographic three-dimensional display
Sava
Tay,
P.-A. Blanche,
R. Voorakaranam,
A. V. Tunç,
W. Lin,
S. Rokutanda,
T. Gu,
D. Flores,
P. Wang,
G. Li,
P. St Hilaire,
J. Thomas,
R. A. Norwood,
M. Yamamoto
&
N. Peyghambarian
Nature 451, 694-698(7 February 2008)
doi:10.1038/nature06596
The 2D perspective views of the object are generated using a 3D computer model or a video camera moving on tracks around the object. The perspective images are re-organized (hogel data) and uploaded to the SLM. The SLM modulates the object beam, which is focused to the photorefractive polymer and recorded in the Fourier transform geometry. The completed display can be viewed using a reading beam. The result is realistic 3D imagery with parallax and depth. The holograms can be erased by uniform illumination at the writing wavelength.