<title>Autostereoscopic projector and display screens</title>

Proceedings of SPIE, 1996

Optical Engineering, 1994

Displayers tend to becomethree-dimensional.Themost advantage of holographic 3D displays is the possibility to observe 3Dimages without using glasses. The quality of created images by this method has surprised everyone. In this paper, the experimental steps of making a transmission hologram have been mentioned. In what follows, current advances of this science-art will be discussed. The aim of this paper is to study the recent improvements in creating three-dimensional images and videos by means of holographic techniques. In the last section we discuss the potentials of holography to be applied in future.

Procreedings of the 11th International Symposium on Display Hologrpahy, 2018

Direct-write digital holographic printing (DWDH) is a technique by which color reflection holograms or white-light transmission holograms of an object or a scene can be produced out of a series of suitable perspective images. The technique is well suited to the production of scaled up or down holographic images of objects or scenes allowing at the same time slight movements, animation, layering and multiple channels to be encoded. The series of perspective images can be digitally captured in video or photographs or be produced by rendering frames of a 3d model with the aid of 3d computer graphics software. The Hellenic Institute of Holography (HiH) has been testing the process since 2009 producing suitable series of perspective images by using most of the available image capturing techniques and subsequently printing rendered data by Geola Digital for the visualization of artworks and historic sites. The produced holograms range from small artworks to large scale scenes incorporating in most cases layering, movement or animation. It is of great significance that the video or photographically captured perspective views of a real object or scene, as processed by Geola, result in holograms which recreate 3d images with details resolution far better than those of a 3D model produced from the 2D-to-3D conversion of the same set of perspective views. In this paper we present DWDH printed holograms of various artworks and historic sites, the various methods used for capturing perspective views and the underlying printing processes for eventual use in cultural heritage preservation.

Proc. SID …, 2008

An autostereoscopic display system, which allowed multiple viewers simultaneously by use of head-tracking, was previously demonstrated for TV applications in the ATTEST project. However, the requirement for a dynamically addressable, movable backlight presented several problems for the illumination source. In this paper, the authors demonstrate how the use of a novel laser-based holographic projection system can be used to address these problems.

Applied Optics, 1970

A new technique has been devised for recording and reconstructing holograms which can be viewed from a wide range of angles simultaneously by a large number of people. The problems which arise through the use of this technique have been analyzed and the limitations delineated. Satisfactory wide angle, three-dimensional displays have been constructed in the manner described by using absorption holograms. The features of these holographic displays agree qualitatively with the predicted theoretical limitations.

Applied Sciences, 2019

Most of the previously-tried prototype systems of digital holographic display are of front viewing flat panel-type systems having narrow viewing angle, which do not meet expectations towards holographic displays having more volumetric and realistic 3-dimensional image rendering capability. We have developed a tabletop holographic display system which is capable of 360° rendering of volumetric color hologram moving image, looking much like a real object. Multiple viewers around the display can see the image and perceive very natural binocular as well as motion parallax. We have previously published implementation details of a mono color version of the system, which was the first prototype. In this work, we present requirements, design methods, and the implementation result of a full parallax color tabletop holographic display system, with some recapitulation of motivation and a high-level design concept. We also address the important issue of performance measure and evaluation of a h...

2012

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Optics express, 2016

We demonstrate a tabletop holographic display system for simultaneously serving continuous parallax 3.2-inch 360-degree three-dimensional holographic image content to multiple observers at a 45-degree oblique viewing circumference. To achieve this, localized viewing windows are to be seamlessly generated on the 360-degree viewing circumference. In the proposed system, four synchronized high-speed digital micro-mirror displays are optically configured to comprise a single 2 by 2 multi-vision panel that enables size enlargement and time-division-multiplexing of holographic image content. Also, a specially designed optical image delivery sub-system that is composed of parabolic mirrors and an aspheric lens is designed as an essential part for achieving an enlarged 3.2-inch holographic image and a large 45-degree oblique viewing angle without visual distortion.

International Journal for Research in Applied Science and Engineering Technology, 2021

In this paper we discuss about the current technology "Holographic Display/Projection" and its interactive feature. We discuss about the holograms, their types, physics and mathematics used in it, its interactive feature of responding to finger gestures and the hand-drawn interface (electro-holography). We also discuss about the applications of Holography and the future of this technology, how will it help and what can be the advancement, and also the hypothetical suggestions that what else new can be added further in this technology. And ends with a conclusion that what have we found out in the research, what is the scope of this technology, why this should be used, and where can it be used. We will also learn that how this technology can help the humans to become futuristic and advanced.