NEC GT2000 - Manual (Page 24)

E-24
α
β (sin= α )
γ (cos= α )
Screen Size
H–Width
4 : 3 Diagonal
A ( = C)
D
E
inch
mm
inch
mm
mm
inch
mm
inch
mm
inch
32
812.8
40
1016
833
32.8
221
8.7
84
3.3
48
1219.2
60
1524
1303
51.3
373
14.7
84
3.3
56
1422.4
70
1778
1539
60.6
449
17.7
84
3.3
64
1625.6
80
2032
1774
69.8
525
20.7
84
3.3
72
1828.8
90
2286
2009
79.1
602
23.7
84
3.3
80
2032
100
2540
2244
88.3
678
26.7
84
3.3
96
2438.4
120
3048
2714
106.8
830
32.7
84
3.3
120
3048
150
3810
3419
134.6
1059
41.7
84
3.3
144
3657.6
180
4572
4124
162.4
1287
50.7
84
3.3
160
4064
200
5080
4594
180.9
1440
56.7
84
3.3
Formulas (mm)
H mm=Horizontal Screen Width
C = {[(H/ 26.6) – 30.77]
ן30.8} + 841.3
D = (0.375
ןH) – 84.2
E = 84.2
Formulas (inch)
H inch=Horizontal Screen Width
C = {[(0.95
ןH)– 30.8]ן1.21} + 33.1
D = (0.375
ןH) – 3.3
E =3.3
C : Horizontal throw distance between the screen surface and the lens
D : Vertical distance between the projector foot and the base of image
E : Vertical distance between the projector foot and the screen center
Degree
0
0
1
2
4
3
1
2
3
4
1 2 3 4 5 6 7 8 (m)
(m)
0.0
0.0
1.0
C
Screen center line
Desktop line
Screen Bottom
E
D
GT2000R
GT2000R