Hologram Transmission via Television

Enloe, L. H.; Murphy, John A.; Rubinstein, C. B.

doi:10.1002/j.1538-7305.1966.tb00026.x

Cited by 64 publications

(17 citation statements)

References 3 publications

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“…This method allowed the desired image terms to be separated in the reconstruction, since they are recorded as the modulation of a spatial carrier kg. The recording of a hologram of this type using a television camera [3,4] requires restricting the arrangement to a relatively narrow-angle, limited-resolution system where the spatial carrier can be resolved by the television camera. In order to avoid the high-resolution requirements associated with this spatial carrier, an in-line reference can be used where the temporal frequency of the reference wave is offset [5][6][7][8] an amount co.…”

Section: Technical Discussionmentioning

confidence: 99%

Considerations of Television Holography

Macovski

1971

Optica Acta: International Journal of Optics

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Television holography systems are considered with particular emphasis on the resolution requirements of the camera and reproducer. Methods are shown whereby conventional cameras and reproducers can be efficiently used at real-time scan rates. The spatial frequency requirements for the camera are minimized by using an on-axis reference wave. This wave is shifted in frequency or phase so as to create a signal that allows for the separation of the desired image terms.

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Section: Technical Discussionmentioning

confidence: 99%

Considerations of Television Holography

Macovski

1971

Optica Acta: International Journal of Optics

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“…However, this is offset against the need for a very high bandwidth and the difficulty of obtaining natural shading. The display of captured and transmitted 3DTV video signals by holographic means is highly desirable [82]. However, a full parallax, large area, interactive, moving, color holographic display, which is thought by many to be the ultimate goal of 3DTV, requires incremental and parallel development in many essential areas of technology before it can be brought to fruition.…”

Section: Holographic Displaysmentioning

confidence: 99%

A Survey of 3DTV Displays: Techniques and Technologies

Benzie

Watson

Surman

et al. 2007

IEEE Trans. Circuits Syst. Video Technol.

198

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The display is the last component in a chain of activity from image acquisition, compression, coding transmission and reproduction of 3-D images through to the display itself. There are various schemes for 3-D display taxonomy; the basic categories adopted for this paper are: holography where the image is produced by wavefront reconstruction, volumetric where the image is produced within a volume of space and multiple image displays where two or more images are seen across the viewing field. In an ideal world a stereoscopic display would produce images in real time that exhibit all the characteristics of the original scene. This would require the wavefront to be reproduced accurately, but currently this can only be achieved using holographic techniques. Volumetric displays provide both vertical and horizontal parallax so that several viewers can see 3-D images that exhibit no accommodation/convergence rivalry. Multiple image displays fall within three fundamental types: holoform in which a large number of views give smooth motion parallax and hence a hologram-like appearance, multiview where a series of discrete views are presented across viewing field and binocular where only two views are presented in regions that may occupy fixed positions or follow viewers' eye positions by employing head tracking. Holography enables 3-D scenes to be encoded into an interference pattern, however, this places constraints on the display resolution necessary to reconstruct a scene. Although holography may ultimately offer the solution for 3DTV, the problem of capturing naturally lit scenes will first have to be solved and holography is unlikely to provide a short-term solution due to limitations in current enabling technologies. Liquid crystal, digital micromirror, optically addressed liquid crystal and acoustooptic spatial light modulators (SLMs) have been employed as suitable spatial light modulation devices in holography. Liquid crystal SLMs are generally favored owing to the commercial availability of high fill factor, high resolution addressable devices. Volumetric displays provide Manuscript both vertical and horizontal parallax and several viewers are able to see a 3-D image that exhibits no accommodation/convergence rivalry. However, the principal disadvantages of these displays are: the images are generally transparent, the hardware tends to be complex and non-Lambertian intensity distribution cannot be displayed. Multiple image displays take many forms and it is likely that one or more of these will provide the solution(s) for the first generation of 3DTV displays.

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“…Both the detection and image formation techniques were analog rather than digital. Enloe et al [2] performed a hybrid experiment, in which a vidicon was used as a detector, but the reconstruction of the image was obtained optically by photographing the output of a TV monitor. By both detecting the hologram and reconstructing the image digitally, Goodman and Lawrence were able to streamline the holographic process.…”

Section: Electronic Holographymentioning

confidence: 99%