NEC MT830 - Manual (Page 19)

19
35
36
Distance Chart
A
C
D
E
MT830+/MT1030+
Formulas(mm)
H (mm) =Horizontal Screen Width
M=1.25H/33.02(Projection magnification)
A=C/cos
α
C (WIDE)=53.2 ן M-85.609
C (TELE)=C(WIDE) ן 1.3055
D ={(3H/8)-(92.2+8M)}
=1.906M-92.2
E=92.2+8M
Formulas(inch)
H (inch) =Horizontal Screen Width
M=1.25H/1.3(Projection magnification)
A=C/cos
α
C (WIDE)=2.09445 ן M-3.37
C (TELE)=C(WIDE)
ן
1.3055
D ={(3H/8)-(92.2+8M)}/25.4
=(1.906M-92.2)/25.4
E=(92.2+8M)/25.4
A : Distance between the lens and the screen center
C : Horizontal throw distance between the screen surface and the lens
D : Vertical distance between the projector foot and the bottom of image
E : Vertical distance between the projector foot and the screen center
INSTALLATION
α
MT1035+
Formulas (mm)
H (mm) =Horizontal Screen Width
M=1.25H/ 33.02 (Projection magnification)
A=C/ cos
α
C (WIDE) = 49.2 ן M–72.789
C (TELE) = C (WIDE) ן 1.31
D=1.982 ן M–91.9
E= 91.9+7.69 ן M
Formulas (inch)
H (inch) = Horizontal Screen Width
M = 1.25H/ 1.3 (Projection magnification)
A = C / cos
α
C (WIDE)= 1.93701 ן M–3.37
C (TELE)= C (WIDE) ן 1.31
D=1.982
ן
M–91.9/ 25.4
E= (91.9 + 7.69 ן M) / 25.4