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Proceedings Paper

Visor projected HMD for fast jets using a holographic video projector
Author(s): Jonathan P. Freeman; Timothy D. Wilkinson; Paul Wisely
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Paper Abstract

With the advent of faster computers, higher resolution LC displays, and cheap lasers there has been a surge in interest in building video projection systems where a computer generated hologram (CGH) is calculated from the video image and displayed on a LC display (used as a phase device). A laser then reconstructs the video image and projects it. A major advantage of this type of projection system is the LC display can have a substantial number of dead pixels without causing a misinterpretation of the information in the displayed symbology or video. In this work we not only developed an HMD using this technique but also incorporated aberration correction into the hologram to reduce lens complexity and weight. The system was designed to fit onto a conventional HGU53P helmet and project off the slightly forward visor (based on the BAE Systems Viper 1 HMD configuration). The optics, laser and LC display all fitted between the area swept by the raised visor and the helmet shell. The end result was two methods of producing a 22 degree FOV display, both capable of easily achieving 4000fL symbology at the eye in red or green with a 75% transmissive visor. Symbology and video could be mixed with the symbology an order of magnitude brighter than the video.

Paper Details

Date Published: 15 May 2010
PDF: 12 pages
Proc. SPIE 7690, Three-Dimensional Imaging, Visualization, and Display 2010 and Display Technologies and Applications for Defense, Security, and Avionics IV, 76901H (15 May 2010); doi: 10.1117/12.855020
Show Author Affiliations
Jonathan P. Freeman, Univ. of Cambridge (United Kingdom)
Timothy D. Wilkinson, Univ. of Cambridge (United Kingdom)
Paul Wisely, BAE Systems Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 7690:
Three-Dimensional Imaging, Visualization, and Display 2010 and Display Technologies and Applications for Defense, Security, and Avionics IV
Bahram Javidi; Jung-Young Son; John Tudor Thomas; Daniel D. Desjardins, Editor(s)

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