Tokyo Institute of Technology, Imaging Science and Engineering Lab., Masahiro Yamaguchi
1. Introduction
Thanks to the recent progress and the spread of multimedia information technology, 3-D imaging systems are currently used in many fields, and the output devices for 3-D images are demanded. As the output for 3-D imaging systems, both softcopy and hardcopy are required, and 3-D representation is especially important in the hardcopy, because the image cannot be interactively manipulated. Holography is one of the promising technology for the device like a 3-D image printer, but several requirements cannot be satisfied by the current technology of holography, as follows;
1) Holograms should be printed by desktop device, that is, large optical bench cannot be used for the printing device.
2) Distortion-free image should be displayed.
3) The hardcopy must be automatically printed from the 3-D data in computer.
As the technology of holographic stereogram is suitable for the 3-D display of computer processed data, a new method of holographic stereogram, called 'multidot' recording method, is developed for automatic printing of distortion-free 3-D images. By the multidot method, full-parallax (i.e. both horizontal and vertical parallaxes) information can be printed by the stable optical system, which is applicable to the desktop printer device. We have developed a prototype of holographic 3-D printer (holoprinter), which automatically produce 3-D holographic images, based on the multidot method. Fig.1 shows the concept of holoprinter.
Figure 1. The concept of holoprinter |
The reconstructed image of the printed hologram is shown in fig.2.
Figure 2. Reconstructed Image |
If you have comments or suggestions, email me at guchi@isl.titech.ac.jp
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