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Proceedings Paper

Concept, design and analysis of a large format autostereoscopic display system
Author(s): F. Knocke; R. de Jongh; M. Frömel
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Paper Abstract

Autostereoscopic display devices with large visual field are of importance in a number of applications such as computer aided design projects, technical education, and military command systems. Typical requirements for such systems are, aside from the large visual field, a large viewing zone, a high level of image brightness, and an extended depth of field. Additional appliances such as specialized eyeglasses or head-trackers are disadvantageous for the aforementioned applications. We report on the design and prototyping of an autostereoscopic display system on the basis of projection-type one-step unidirectional holography. The prototype consists of a hologram holder, an illumination unit, and a special direction-selective screen. Reconstruction light is provided by a 2W frequency-doubled Nd:YVO4 laser. The production of stereoscopic hologram stripes on photopolymer is carried out on a special origination setup. The prototype has a screen size of 180cm × 90cm and provides a visual field of 29° when viewed from 3.6 meters. Due to the coherent reconstruction, a depth of field of several meters is achievable. Up to 18 hologram stripes can be arranged on the holder to permit a rapid switch between a series of motifs or views. Both computer generated image sequences and digital camera photos may serve as input frames. However, a comprehensive pre-distortion must be performed in order to account for optical distortion and several other geometrical factors. The corresponding computations are briefly summarized below. The performance of the system is analyzed, aspects of beam-shaping and mechanical design are discussed and photographs of early reconstructions are presented.

Paper Details

Date Published: 14 October 2005
PDF: 10 pages
Proc. SPIE 5962, Optical Design and Engineering II, 59622P (14 October 2005); doi: 10.1117/12.623527
Show Author Affiliations
F. Knocke, Xetos AG (Germany)
R. de Jongh, Xetos AG (Germany)
M. Frömel, Xetos AG (Germany)

Published in SPIE Proceedings Vol. 5962:
Optical Design and Engineering II
Laurent Mazuray; Rolf Wartmann, Editor(s)

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