Barco R9001960 - Manual (Page 16)

2. Installation Guidelines
2.3.1 Lenses
Available lenses
The following lenses are available, or will become available (contact a BARCO service center) as an option :
Lenses Standard version
QFD(1.27:1) R9840400
QFD(2.5:1) R9840290
QFD(1.4-2.1:1) R9840380
QFD(2.1-3.0:1) R9840390
QFD(3.5-4.5:1) R9840060
QFD(4.5-6.0:1) R9840100
QFD(7:1) R9840410
2.3.2 Lens selection
How to select ?
1. Determine the required screen width.
2. Determine the approximate position of the projector in the projection room with regard to the screen and measure the projector-
screen distance (PD).
3. Use the lens formulas to find the best corresponding PD with regard to the measured projector-screen distance for the required
screen width.
2.3.3 Lens formulas
Formulas
Metric Formulas (meter) Inch formulas (inch)
QFD(1.27:1) PD = 1.29 x SW - 0.0195 + 0.00276/SW PD = 1.29 x SW - 0.77 + 42.78/SW
QFD(2.5:1) PD = 1.324 x SW - 0.065 + 0.0297/SW PD = 1.324 x SW - 0.77 + 46.03/SW
QFD(1.4-2.1:1) PDmin=1.44 x SW + 0.0287 - 0.022/SW
PDmax=2.20 x SW - 0.01 + 0.02/SW
PDmin=1.44 x SW + 1.3 - 34.10/SW
PDmin=1.44 x SW + 1.3 - 34.10/SW
QFD(2.1-3.0:1) PDmin = 2.13 x SW - 0.10 + 0.056/SW
PDmax = 2.90 x SW + 0.10 - 0.0745/SW
PDmin = 2.13 x SW - 0.39 + 86.80/SW
PDmax = 2.90 x SW + 0.39 - 115.47/SW
QFD(3.5-4.5:1) PDmin = 3.374 x SW - 0.115 +
0.0575/SW
PDmax = 4.433 x SW - 0.133 +
0.0556/SW
PDmin = 3.374 x SW - 4.53 + 89.12/SW
PDmax = 4.433 x SW - 5.24 + 86.18/SW
QFD(4.5-6.0:1) PDmin = 4.29 x SW - 0.02 + 0.0009/SW
PDmax = 5.86 x SW + 0.15 + 0.0121/SW
PDmin = 4.29 x SW - 0.79 + 1.395/SW
PDmax = 5.86 x SW + 5.91 + 18.755/SW
QFD(7.0:1) PD = 7.021 x SW + 0.047 + 0.0093/SW PD = 7.021 x SW + 1.85 + 14.41/SW
Lens program to calculate the projector distance is available on the BARCO web side :
http://www.barco.com/projection_systems/customer_services/lens_program.asp
12 R5976182 BARCOREALITY 6500 30012001