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

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

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177, 179, 186, 189, 209,<br />

211, 214, 242, 243<br />

Impact attenuation (see<br />

<strong>Helmet</strong>)<br />

Initial health hazard<br />

assessment report<br />

(IHHAR), 239<br />

Integrated <strong>Helmet</strong> and<br />

Display Sighting System<br />

(IHADSS), 4, 5, 34,<br />

170, 178-181, 187, 195,<br />

198, 202, 212-214, 237,<br />

241-246, 247-252<br />

Integrated Night Vision<br />

Imaging System (INVIS),<br />

177<br />

Interlace ratio, 102, 262<br />

Interpupillary distance (IPD),<br />

26, 57, 68, 146, 177, 240<br />

J<br />

Jitter (see Tracking system)<br />

Just noticeable difference<br />

(jnd) (see also Contrast),<br />

110, 171<br />

L<br />

Lag (latency), 85-88:<br />

acceptable, 88,<br />

display, 87, 88, 182<br />

slaving, 87<br />

sensor/weapon feedback,<br />

87<br />

Lead, lanthanum, zirconate,<br />

and titanate (PLZT), 253<br />

Index 289<br />

Lens:<br />

curvature, 59<br />

focus, 26, 28, 55, 59,<br />

60, 71, 180, 181, 242-<br />

244, 264<br />

focal length, 26, 55, 56,<br />

60<br />

Light emitting diode (LED)<br />

(see Flat panel display)<br />

Linearity, 102, 262<br />

Liquid crystal displays<br />

(LCD) (see Flat panel<br />

display)<br />

Luminance:<br />

range, 15, 35, 41, 48, 84,<br />

111-113, 117, 213, 214,<br />

264<br />

uniformity, 15, 41, 48,<br />

102, 133, 262-264<br />

Luminous efficiency, 34, 36,<br />

42, 152, 153, 263<br />

Luminous transmittance, 212,<br />

213, 252, 253, 263, 264<br />

Luning, 149-151<br />

M<br />

Magnification, 26, 28, 73,<br />

135, 139, 140, 146, 148,<br />

149, 240, 265<br />

Manprint program<br />

(MANPRINT), 235<br />

Mass moment of inertia<br />

(MOI), 187, 211<br />

Mean time between failure<br />

(MTBF), 263

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