Head position and orientation sensor
First Claim
1. An apparatus for monitoring the head position and orientation of an observer while viewing a visual scene upon a spherical retroreflective screen, comprising:
- means for projecting said visual scene mounted on said observer'"'"'s head;
means for detecting said projected visual scene at a plurality of points on said spherical retroreflective screen, said detecting means having an electrical signal output corresponding to each of said points;
computational means for correlating said detecting means output to said visual scene temporally, and for solving for head position and orientation, receiving input from said detecting means and said projecting means, and outputting a signal based thereon.
1 Assignment
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Accused Products
Abstract
A head position and orientation sensor system utilizes a head mounted protor of known scan pattern which presents a visual display to the observer. In order to maintain proper display orientation, the head position and orientation are measured by intercepting the projected light scan pattern at a retroreflective screen upon which the visual display is focused. A photodetector array mounted in said screen intercepts the visual display regardless of head orientation and position. A computational unit having knowledge of the scan pattern parameters correlates the photodetector array output to a unique head position and orientation.
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Citations
10 Claims
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1. An apparatus for monitoring the head position and orientation of an observer while viewing a visual scene upon a spherical retroreflective screen, comprising:
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means for projecting said visual scene mounted on said observer'"'"'s head; means for detecting said projected visual scene at a plurality of points on said spherical retroreflective screen, said detecting means having an electrical signal output corresponding to each of said points; computational means for correlating said detecting means output to said visual scene temporally, and for solving for head position and orientation, receiving input from said detecting means and said projecting means, and outputting a signal based thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification