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

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INDEX A Aberration: astigmatic, 15, 20, 264, chromatic, 15, 20, 58, 59, 61, 264 distortion, 15, 20, 48, 56 58-60, 71, 72, 80, 130- 132, 146, 149, 213, 264 spherical, 15, 20, 58-60, 264 field curvature, 60 Accommodation, 146, 181 Achromats, 58, 59 Acoustical protection, 13, 26, 185, 187, 219, 220, 222- 225, 230 Active noise reduction (ANR), 220, 222-224, 226, 227, 230, 231, Acuity (see Visual acuity) Advanced helicopter pilotage (AHP), 7 Aircraft retained unit (ARU), 5, 138, 139 Aircrew integrated helmet system (AIHS), 7, 39 Aspect ratio, 102, 262 Armed forces vision tester (AFVT), 175-177 Aviation life support equipment (ALSE), 236, 237, 249, 251 Aviator’s night vision imaging system (ANVIS), 3, 4, 22, 24, 26, 27, 36, 56-58, 61, 68, 73, 79, 85, 89, 93, 103, 121, 123, 130-132, 134, 135, 138, 140, 143, 146, 151, 176, 177, 181, 186, 202, 214, 240-244, 250, 252 B Bandwidth, 34, 38, 102, 120, 124, 262 Beamsplitter (see Combiner) Biocular displays, 5, 7, 20- 21, 132, 138, 143, 145- 148, 243, 247 Binocular: alignment, 68, 71, 146- 149,181, 236, 237 displays, 21, 22, 26, 84, 132, 134, 136-139, 143- 147,176-178,181, 240, 243 overlap, 7, 22, 26, 132, 134, 136, 137, 143, 145, 149, 150, 151, 264 rivalry, 150, 180 Boresight 241, 265 Brain actuated control, 85, Brightness (see Luminance) 283
284 Index Breakaway force (see Frangibility) Brown eye syndrome, 153 C Cathode ray tubes (CRT): contrast, 34, 36-38, display, 4, 5, 11, 22, 27, 202, 239 figure of merit (FOM): electronic, 262 geometric, 262 photometric, 262 image quality, 33, 34, 38, 101-103, 120, 242, 263 luminance, 34-37, 102 modulation contrast, 38, 104,105,107, 108, 119, 124, 127-130, 172 operating characteristics, 35, 237, 239, 263 phosphors, 34, 36-37, 75 114, 127 resolution, 24, 34, 38, 60, 120, 262, 264 spot size, 34, 35, 38, 262 Center of mass (CM), 13, 20, 24, 26, 183, 184, 185-187, 189-191, 193-196, 211, 239 Chromaticity, 15, 103, 115- 116, 264 Cockpit display emission, 264 Color (also see Chromatic): discrimination, 20, 115, 119 versus monochrome, 41, 114, 151-152 Comanche (RAH-66), 5, 6, 21, 39, 120, 138, 247- 249 Combiners, 22, 24, 27, 116, 133, 143, 165, 241 dichroic, 27, 75 holographic, 24, 75, 78, partially silvered, 75 Comfort/Discomfort, 13, 135, 180, 181, 187, 188, 204- 206, 208, 211, 222, 228- 230, 247-249, 264, 265 Communications earplug (CEP), 220-223, 226-231 Contrast: color, 44, 45, 49, 103,114- 116, 119, 152, 171 grey levels, 102, 103, 111, 127, 129 just noticeable difference (jnd), 110, 171 luminance, 102-118, 140 target, 104-107, 114, 118,165, 170, 172 background, 104-107, 213 modulation, 104-108, 119, 126-128, 130, 126-128, 172 pixel, 103, 112-114, 133, 152 range, 15, 36, 48, 105,
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Helmet-Mounted Displays: Design Iss
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The views, opinions, and/or finding
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vi Contents 4. Visual Coupling Clar
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viii Contents References ..........
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x Ben T. Mozo, Research Physicist U
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xii Foreword began its phenomenal e
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xiv Preface Acknowledgments The aut
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Introductory Overview 1 Clarence E.
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Introductory Overview 5 Figure 1.2.
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Introductory Overview 7 The trend f
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Introductory Overview 9
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Introductory Overview 11 aviator to
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Introductory Overview 13 1970's. Ta
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Introductory Overview 15 Image sour
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Introductory Overview 17
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Table 1.3. HMD performance figures-
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Introductory Overview 21 direct vie
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Introductory Overview 23 Figure 1.9
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Introductory Overview 25 Figure 1.1
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Introductory Overview 27 Ercoline,
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Introductory Overview 29 II, Procee
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Introductory Overview 31 Armstrong
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34 Clarence E. Rash, Melissa H. Led
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40 Liquid crystal Clarence E. Rash,
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Optical Designs 3 William E. McLean
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Optical Designs 57 and plotted in l
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Optical Designs 59 phosphors, (b) u
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Optical Designs 61 optics. Examples
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Optical Designs 63
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prism combiner. Optical Designs 65
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Figure 3.2. (continued) Optical Des
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Optical Designs 69
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Optical Designs 71 Figure 3.4. Comp
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Optical Designs 73 Figure 3.6. Opti
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Optical Designs 75 Figure 3.8. Refl
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Optical Designs 77 Figure 3.9. Ray
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Optical Designs 79 incidence and re
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80 Clarence E. Rash hinted at befor
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82 Clarence E. Rash metal tolerant
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84 Clarence E. Rash the performance
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86 Clarence E. Rash Figure 4.3. Hig
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88 Clarence E. Rash imagery in HMDs
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90 Clarence E. Rash as with ANVIS.
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92 Clarence E. Rash performance, on
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94 Clarence E. Rash effects on visu
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96 Clarence E. Rash concerning roll
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98 Aeromedical Research Laboratory.
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DESIGN ISSUES PART TWO
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102 Clarence E. Rash and William E.
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104 Contrast Clarence E. Rash and W
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168 Number of SOG = � log (C r) /
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Visual Performance 6 William E. McL
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Visual Performance 171 observer is
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seen. Visual Performance 173 Figure
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Visual Performance 175 perception.
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Visual Performance 177 with monovis
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Visual Performance 179 individuals
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Visual Performance 181 0 to -5.25 d
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Visual Performance 183 Report No. 9
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Biodynamics 7 B. Joseph McEntire He
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Biodynamics 187 behavior of this de
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Figure 7.2. Head anatomical coordin
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Biodynamics 191
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Biodynamics 193 al., 1972), and man
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Biodynamics 195 Figure 7.5. Vertica
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Biodynamics 197 disability and fata
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Biodynamics 199 been fabricated int
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Biodynamics 201 Ty pic al acc ele r
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Biodynamics 203 exceed the mechanic
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Biodynamics 205 complexity and comp
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Type Reference helmet Foam in place
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Biodynamics 209 the fitting problem
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Biodynamics 211 adjustment buckle,
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Biodynamics 213 down. The helmet ma
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Biodynamics 215 Desert Shield/Deser
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Biodynamics 217 Donelson, S. M., an
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219 Fort Rucker, AL: U.S. Army Aero
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220 Ben T. Mozo Figure 8.1. Noise l
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222 Ben T. Mozo available in the ne
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224 Ben T. Mozo Protectors”(ANSI,
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226 Ben T. Mozo language. Tests of
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228 Ben T. Mozo Figure 8.6. Speech
Page 249 and 250: 230 Ben T. Mozo the communications
Page 251 and 252: 232 Ben T. Mozo Item Mass (grams) C
Page 253 and 254: Ribera, J. E., and Mozo, B. T. Unda
Page 255 and 256: 236 Joseph R. Licina operational us
Page 257 and 258: 238 Joseph R. Licina Standard MIL-S
Page 259 and 260: 240 Joseph R. Licina On electro-opt
Page 261 and 262: 242 Joseph R. Licina For HMDs with
Page 263 and 264: 244 Joseph R. Licina 1994b) that wi
Page 265 and 266: 246 Joseph R. Licina Table 9.2. Hea
Page 267 and 268: 248 Joseph R. Licina provided a 93.
Page 269 and 270: 250 Joseph R. Licina and buckles, a
Page 271 and 272: 252 Joseph R. Licina authorized to
Page 273 and 274: 254 Joseph R. Licina a nuclear flas
Page 275 and 276: 256 Joseph R. Licina requirements:
Page 277: HMD PERFORMANCE ASSESSMENT PART THR
Page 280 and 281: 262 Clarence E. Rash, John C. Mora,
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Page 288 and 289: 270 making stereoposis possible. Bi
Page 290 and 291: 272 John C. Mora and M elissa H. Le
Page 297 and 298: NOTES ON CONTRIBUTORS Melissa H. Le
Page 299: Notes on Contributors 281 Research
Page 305 and 306: 286 Index movement, 55, 80, 84, 90,
Page 307 and 308: 288 Index 198, 204, 205, 208, 210,
Page 309 and 310: 290 Index Microphone, 15, 186, 224,
Page 311 and 312: 292 Index Speech intelligibility (S
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