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Real-time transmission of three-dimensional scenes requires huge carrier bandwidths, as images at different viewing angles have to be transmitted at the usual TV rate of 25 images/second.
English (United States)
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Three-Dimensional Television using Optical Fibers
Real-time transmission of three-dimensional scenes requires huge carrier
bandwidths, as images at different viewing angles have to be transmitted at the
usual TV rate of 25 images/second.
In optical fiber transmission systems, the necessary bandwidth can be
obtained by image color encoding.
In the figure, the object (scene 400) to be transmitted is illuminated by source
401 with white light which is reflected from the object and directed to color
encoder 405 via elliptical mirror 402, oscillating flat mirror 403 and lens 404. The
scene is scanned at different viewing angles by flat mirror 403 oscillating about
two mutually perpendicular axes.
Color encoder 405 consists of two blazed diffraction grids oriented
perpendicularly to each other and producing very high and very low order
diffractions, respectively. The encoder output (and the input to optical fibers 406)
consists of color encoded light, each frequency (or very narrow frequency range)
uniquely corresponding to the geometric location of an object point. To
reconstruct the image at the receiving end, an identical color encoder together
with a flat mirror moving in synchronism with mirror 403 is used.
The proposed color encoding principle offers a very great number of data
channels (approximately 10/8/ frequency bands) which are operated in parallel,
leading to a transmission capacity of 10/14/ baud.