Mark-I Holographic Video Display is capable of rendering full-color
25x25x25mm images with a 15° view-zone at rates over 20
second. The holographic image is generated using a three-channel
tellurium-dioxide Acousto-Optic Modulator (AOM). A holographic
pattern is sent through each channel of the AOM to modulate
green (double-YAG) and blue (HeCd) light. The three resulting
are combined using a Holographic Optical Element (HOE), to
horizontal line of the horizontal-parallax-only image. To
resolution for the holographic diffraction pattern, each horizontal
line is 32K
samples per color. Since the holographic fringe pattern in
the AOM is
moving, a horizontal scanning mirror (18-sided spinning polygon)
to scan out the horizontal line and make the image appear
vertical scanning mirror is used to produce 64 lines (at video
in a raster scan fashion.
Each frame of the holographic image is 6-MBytes and needs
by a frame buffer as a 32K-sample horizontal by 64-line vertical
simultaneously for red, green and blue. We are currently using
Graphics Onyx with an RE2 to be able to produce these patterns
format at near video rates. The display can be run in two
displaying pre-computed images at over 20 frames per second,
interactive mode updating the image at over 2 frames per second.
interactive mode, a user can manipulate the image using several
and each new 6-MByte fringe pattern is computed on the fly.
operations include choosing new 3D objects, scaling and rotating
objects, and changing the lighting direction.
The design of the Mark-I monochromatic and full color display
is detailed in the following papers:
P. St.-Hilaire, S.A. Benton, M. Lucente, and P.M. Hubel,
"Color images with the MIT holographic video display,"
in: S.A. Benton, ed., SPIE Vol. 1667, Practical Holography
VI (Feb., 1992), paper 1667-73, pp. 73-84.
Mary Lou Jepsen, "Holographic video: design and implementation
of a display system", S.M. Thesis, Department of Architecture,
Massachusetts Institute of Technology, 1989.
Joel S. Kollin, "Design and information considerations
for holographic television", S.M. Thesis, Department
of Architecture, Massachusetts Institute of Technology, 1988.
Underkoffler, "Towards Accurate Computation of Optically
Reconstructed Holograms", S.M. Thesis, Program in Media
Arts and Sciences, Massachusetts Institute of Technology, June
For information on computation and rendering of images on
the Mark-I display, see:
Mark Lucente and Tinsley Galyean, "Rendering
Interactive Holographic Images" Proceedings of SIGGRAPH
'95 (Los Angeles, CA, Aug. 6-11, 1995), pp. 387-394.
additional references, see our publications