7. Appendix
Relationship between Screen Size and Projection distance
Screen size at 4:3 | Zoomed projection |
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aspect ratio | distance | H1 | H2 | aspect ratio | ||||||||
W x D (cm) | Max. | Min. |
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25" | 51 | x | 38 | - | 0.9m | 34cm | 4cm | 23" | 51 | x | 29 | |
| (3.1') | (1.1') | (0.1') | |||||||||
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30" | 61 | x | 46 | - | 1.1m | 41cm | 5cm | 28" | 61 | x | 34 | |
| (3.8') | (1.4') | (0.2') | |||||||||
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40" | 81 | x | 61 | 1.0m | 1.5m | 55cm | 6cm | 37" | 81 | x | 46 | |
(3.2') | (5.1') | (1.8') | (0.2') | |||||||||
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50" | 102 | x | 76 | 1.2m | 1.9m | 69cm | 8cm | 46" | 102 | x | 57 | |
(4.1') | (6.4') | (2.3') | (0.3') | |||||||||
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60" | 122 | x | 91 | 1.5m | 2.3m | 82cm | 9cm | 55" | 122 | x | 69 | |
(4.9') | (7.7') | (2.7') | (0.3') | |||||||||
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70" | 142 | x | 107 | 1.7m | 2.7m | 96cm | 11cm | 64" | 142 | x | 80 | |
(5.8') | (9.0') | (3.2') | (0.4') | |||||||||
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80" | 163 | x | 122 | 2.0m | 3.1m | 110cm | 12cm | 73" | 163 | x | 91 | |
(6.6') | (10.3') | (3.6') | (0.4') | |||||||||
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90" | 183 | x | 137 | 2.3m | 3.5m | 123cm | 14cm | 83" | 183 | x | 103 | |
(7.4') | (11.6') | (4.1') | (0.5') | |||||||||
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100" | 203 | x | 152 | 2.5m | 3.9m | 137cm | 15cm | 92" | 203 | x | 114 | |
(8.3') | (12.9') | (4.5') | (0.5') | |||||||||
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110" | 224 | x | 168 | 2.8m | 4.3m | 151cm | 17cm | 101" | 224 | x | 126 | |
(9.1') | (14.2') | (5.0') | (0.6') | |||||||||
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120" | 244 | x | 183 | 3.0m | 4.7m | 165cm | 18cm | 110" | 244 | x | 137 | |
(9.9') | (15.5') | (5.4') | (0.6') | |||||||||
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130" | 264 | x | 198 | 3.3m | 5.1m | 178cm | 20cm | 119" | 264 | x | 149 | |
(10.8') | (16.8') | (5.9') | (0.7') | |||||||||
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140" | 284 | x | 213 | 3.5m | 5.5m | 192cm | 21cm | 129" | 284 | x | 160 | |
(11.6') | (18.1') | (6.3') | (0.7') | |||||||||
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150" | 305 | x | 229 | 3.8m | 5.9m | 206cm | 23cm | 138" | 305 | x | 171 | |
(12.4') | (19.4') | (6.8') | (0.8') | |||||||||
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160" | 325 | x | 244 | 4.0m | 6.3m | 219cm | 24cm | 147" | 325 | x | 183 | |
(13.3') | (20.7') | (7.2') | (0.8') | |||||||||
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170" | 345 | x | 259 | 4.3m | 6.7m | 233cm | 26cm | 156" | 345 | x | 194 | |
(14.1') | (22.0') | (7.7') | (0.9') | |||||||||
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176" | 358 | x | 268 | 4.4m | 6.9m | 241cm | 27cm | 162" | 358 | x | 201 | |
(14.6') | (22.8') | (8.0') | (0.9') | |||||||||
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180" | 366 | x | 274 | 4.5m | 7.1m | 247cm | 27cm | 165" | 366 | x | 206 | |
(14.9') | (23.3') | (8.1') | (0.9') | |||||||||
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190" | 386 | x | 290 | 4.8m | 7.5m | 261cm | 29cm | 174" | 386 | x | 217 | |
(15.8') | (24.6') | (8.6') | (1.0') | |||||||||
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200" | 406 | x | 305 | 5.0m | - | 274cm | 31cm | 184" | 406 | x | 229 | |
(16.6') |
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210" | 427 | x | 320 | 5.3m | - | 288cm | 32cm | 193" | 427 | x | 240 | |
(17.5') |
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220" | 447 | x | 335 | 5.5m | - | 302cm | 34cm | 202" | 447 | x | 251 | |
(18.3') |
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230" | 467 | x | 351 | 5.8m | - | 315cm | 35cm | 211" | 467 | x | 263 | |
(19.1') |
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240" | 488 | x | 366 | 6.0m | - | 329cm | 37cm | 220" | 488 | x | 274 | |
(20.0') |
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250" | 508 | x | 381 | 6.3m | - | 343cm | 38cm | 229" | 508 | x | 286 | |
(20.8') |
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260" | 528 | x | 396 | 6.6m | - | 357cm | 40cm | 239" | 528 | x | 297 | |
(21.6') |
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270" | 549 | x | 411 | 6.8m | - | 370cm | 41cm | 248" | 549 | x | 309 | |
(22.5') |
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280" | 569 | x | 427 | 7.1m | - | 384cm | 43cm | 257" | 569 | x | 320 | |
(23.3') |
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290" | 589 | x | 442 | 7.3m | - | 398cm | 44cm | 266" | 589 | x | 331 | |
(24.1') |
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300" | 610 | x | 457 | 7.6m | - | 411cm | 46cm | 275" | 610 | x | 343 | |
(25.0') |
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