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Arc center
Screen
Only [KEYSTONE] used
Vertical
Horizontal
keystone
keystone
correction
correction
angle α (°)
angle β (°)
±40
±20
Note
f When [SCREEN ADJUSTMENT] is used, the focus of the entire screen may be lost as correction increases.
f Make the curved screen a circular arc shape with one part of a perfect circle removed.
Projection distance
A ±5 % error in listed projection distances may occur.
When [SCREEN ADJUSTMENT] is used, distance is corrected to become smaller than the specified image size.
Projected image
Projection distance
size
Min.
Diagonal (SD)
(LW)
1.02 (40")
1.22
1.27 (50")
1.54
1.52 (60")
1.86
1.78 (70")
2.18
2.03 (80")
2.50
2.29 (90")
2.82
2.54 (100")
3.14
3.05 (120")
3.78
3.81 (150")
4.74
5.08 (200")
6.34
6.35 (250")
7.94
7.62 (300")
9.54
Formula for calculating the projection distance
To use a projected image size not listed in this manual, check the projected image size SD (m) and use the
respective formula to calculate the value.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
When calculating the value using image size designation (value in inches), multiply the value in inches by 0.0254
and substitute it into SD in the formula.
Projected image size
Height (SH)
Projected image size
Width (SW)
Minimum projection distance
(LW)
Maximum projection distance
(LT)
Chapter 2 Getting Started — Setting up
Projection distance
Arc radius
[KEYSTONE] and [CURVED CORRECTION] used together
Vertical
Horizontal
keystone
keystone
correction
correction
angle α (°)
angle β (°)
±20
±15
Aspect ratio 16:10
(L)
Height
position (H)
Max.
(LT)
2.51
-0.08 - 0.51
3.15
-0.09 - 0.63
3.78
-0.11 - 0.76
4.42
-0.13 - 0.89
5.06
-0.15 - 1.01
5.70
-0.17 - 1.14
6.34
-0.19 - 1.27
7.61
-0.23 - 1.52
9.53
-0.28 - 1.90
12.72
-0.38 - 2.53
15.91
-0.47 - 3.16
19.10
-0.57 - 3.80
Aspect ratio 16:10
= SD x 0.530
= SD x 0.848
= 1.2598 x SD - 0.0526
= 2.5118 x SD - 0.0390
Arc center
Min. value of
Min. value of
R2/L2
0.9
Aspect ratio 16:9
Projection distance
(L)
Height
position (H)
Min.
Max.
(LW)
(LT)
1.26
2.58
-0.07 - 0.47
1.59
3.23
-0.09 - 0.59
1.92
3.89
-0.10 - 0.70
2.24
4.55
-0.12 - 0.82
2.57
5.20
-0.14 - 0.94
2.90
5.86
-0.16 - 1.06
3.23
6.51
-0.17 - 1.17
3.89
7.82
-0.21 - 1.41
4.88
9.79
-0.26 - 1.76
6.52
13.07
-0.35 - 2.34
8.16
16.35
-0.44 - 2.93
9.81
19.63
-0.52 - 3.51
Aspect ratio 16:9
= SD x 0.490
= SD x 0.872
= 1.2949 x SD - 0.0526
= 2.5816 x SD - 0.0390
Screen
Projection distance
Arc radius
Only [CURVED CORRECTION]
used
Min. value of
R3/L3
R2/L2
1.7
0.5
Aspect ratio 4:3
Projection distance
(L)
Min.
Max.
(LW)
(LT)
1.39
2.85
1.75
3.57
2.12
4.29
2.48
5.01
2.84
5.73
3.20
6.46
3.57
7.18
4.29
8.62
5.38
10.79
7.19
14.40
9.00
18.01
10.81
21.62
Aspect ratio 4:3
= SD x 0.6
= SD x 0.8
= 1.4262 x SD - 0.0526
= 2.8436 x SD - 0.0390
ENGLISH - 33
Min. value of
R3/L3
1.0
(Unit: m)
Height
position (H)
-0.09 - 0.58
-0.11 - 0.72
-0.13 - 0.86
-0.15 - 1.00
-0.17 - 1.14
-0.19 - 1.29
-0.21 - 1.43
-0.26 - 1.72
-0.32 - 2.15
-0.43 - 2.87
-0.53 - 3.58
-0.64 - 4.30
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