Helmet display

Details Helmet display Helmet display

1988-10-31

1990-01-30

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

340705, 350 65, 358 3, 358 53, 358 63, 358 88, 358104, 358199, 358206, 358230, 358241, H04N 718, H04N 914, H04N 308, H04N 1300

Patent

active

048977152

ABSTRACT:
A helmet mountable display system includes separate optical paths for providing a respective image to the left and right eye of an observer for stereoscopic viewing. Each of a first and second plurality of spaced apart, substantially point light sources supply a respective group of modulated rays of light. The rays of each group are collimated by a respective input lens and the collimated rays from each input lens are directed so that their envelopes all intersect at the same point. A horizontal and a vertical deflecting surface are disposed on opposite sides of the intersection point. Electro-mechanical drivers move the surfaces which scan all the collimated rays. The scanned rays from each group are focused onto a respective screen by a respective output lens to form a raster scanned image. The screens are divided into a plurality of contiguous zones with a ray from each light source assigned to a corresponding zone, which reduces the vertical scan angle excursions required. Simultaneous scan lines from the rays are displayed in each zone on the screen which reduces the video bandwidth requirement of the system. The image from the screens is supplied to the inside surface of a visor from which it is reflected to a corresponding eye of the observer.

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"A helmet mounted sight system for fighter aircraft"; by Stephenson et al; GEC Journal of Science & Technology, vol. 46, No. 1 (1980) pp. 33-38.
Bruce J. Schachter, Computer Image Generation, pp. 123-124, John Wiley & Sons, 1983.

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