Lens Formulas; Lens Installation - Barco FLM HD20 User Manual

3. Physical installation
3. Use the lens formulas to find the best corresponding PD with regard to the measured projector-screen distance for the required
screen width SW.
Tip: Divide PD by SW to determine the approximately required throw ratio. Choose a lens, which captures the calculated
throw ratio. Use the lens formula of the chosen lens to recalculate exactly.
Image 3-16
3.2.3

Lens formulas

Formulas
Lens
TLD HB (0.8 : 1)
TLD (1.2 : 1)
TLD+(1.2:1)
TLD HB (1.6 – 2.0
: 1)
TLD HB (2.0 – 2.8
: 1)
TLD HB (2.8 – 5.0
: 1)
TLD HB (5.0 – 8.0
: 1)
TLD+(7.5 – 11.2 :
1)
3.2.4

Lens installation

How to install a lens into the projector lens holder ?
1. Remove the foam rubber in the opening of the lens holder if not removed yet.
2. Take the lens assembly out of its packing material and remove the lens caps on both sides.
3. Place the lens holder in the "unlocked" position by moving the lens lock handle (A) towards the lens power supply socket (B) as
illustrated.
24
PD
Throw ratio for Metric formulas (meter)
FLM HD
0.7 PD = (0.71 x SW ) + 0.05
1.1 PD = (1.03 x SW ) - 0.01
1.2
PD= (1.14 x SW) + 0.11
1.35 – 1.70 PD = (1.36 x SW ) - 0.09
min
PD = (1.71 x SW ) - 0.13
max
1.70 – 2.42 PD = (1.71 x SW ) - 0.17
min
PD = (2.42 x SW ) - 0.24
max
2.42 – 4.35 PD = (2.38 x SW ) - 0.16
min
PD = (4.35 x SW ) - 0.38
max
4.35 – 6.95 PD = (4.17 x SW ) - 0.01
min
PD = (6.95 x SW ) - 0.29
max
6.93 - 10.34
PD = (6.93 x SW ) - 0.2
min
PD = (10.34 x SW ) - 0.32
max
Inch formulas (inch)
PD = (0.71 x SW ) + 1.97
PD = (1.03 x SW ) - 0.39
PD = (1.14 x SW) + 4.33
PD = (1.36 x SW ) - 3.54
min
PD = (1.71 x SW ) - 5.12
max
PD = (1.71 x SW ) - 6.69
min
PD = (2.42 x SW ) - 9.45
max
PD = (2.38 x SW ) - 6.30
min
PD = (4.35 x SW ) - 14.96
max
PD = (4.17 x SW ) - 0.39
min
PD = (6.95 x SW ) - 11.42
max
PD = (6.93 x SW ) - 7.88
min
PD = (10.34 x SW ) - 12.60
max
R59770180 FLM HD20 11/07/2008