Helmet-Mounted Displays: - USAARL - The - U.S. Army

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Contents
4. Visual Coupling
Clarence E. Rash
Introduction ......................................... 79
Tracking Systems .................................... 79
System Lag (delay) ................................... 85
Roll Compensation ................................... 88
Vibration ........................................... 89
Sensor Switching .................................... 91
References .......................................... 93
TWO Design Issues
5. Optical Performance
Clarence E. Rash and William E. McLean
Introduction ........................................ 101
Image Quality ...................................... 102
Field-of-View ...................................... 133
Visual Field ........................................ 137
Magnification ...................................... 139
See-Through Luminous/Spectral Transmittance ........... 140
Exit Pupil ......................................... 141
Extraneous Reflections ............................... 142
Monocular/Biocular/Binocular Considerations ............ 143
Monochrome vs. Color ............................... 151
References ......................................... 154
Appendix .......................................... 165
6. Visual Performance
William E. McLean and Clarence E. Rash
Introduction ........................................ 169
Visual Acuity ...................................... 170
Contrast Sensitivity .................................. 170
Depth Perception and Stereopsis ....................... 175
Visual Illusions and Spatial Disorientation ............... 178
Visual Problems .................................... 179