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| Holography is a technology to record and reproduce optical information with the use of optical interference, and it is considered to reproduce ideal autostereoscopic images. There are, however, many issues to be overcome before this technology can be applied to a three-dimensional television system. While electro-holography handles fine fringe patterns and utilizes electronic imaging and display methods to present these fringe patterns, the quality and viewing zone (viewing space in which the reconstructed image can be seen) of the current display devices fall far short of their potential level. As a step towards an ideal three-dimensional television system, we are trying to improve the image quality and viewing zone of electro-holography. |
| The electro-holography incorporates the following techniques to ensure that the viewing zone will be large enough for binocular viewing. |
- Obstructive light: electro-holography's coarse pixel interval generates an obstructive image, called a conjugate image*1 that overlaps the original reconstructed image. Processing is done to eliminate this obstruction.
- Enlarged viewing zone with higher-order diffracted light*2 : inadequate definition (pixel size) narrows the viewing zone. The diffracted light generated when the image is reconstructed contains components (higher-order light) that are not used for an ordinary display, and we use these to enlarge the viewing zone.
- High-definition liquid crystal panel: we used the best display currently available, in terms of pixel number and size, to enlarge the viewing zone.
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We will improve the imaging technique and display system as part of our ongoing effort to build a three-dimensional television system.
*1 Conjugate image: an image generated along with the reconstructed original image (true image), which has a reverse convexo-concave feature when compared to the true image.
*2 Diffracted light: a phenomenon where light bends around an object. Holography constructs a stereoscopic image in a space by using light diffraction. |
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