Barco FLM HD20 - Lens Formulas; Lens Installation

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.
SCREEN
PD
SW
Image 3-16
3.2.3 Lens formulas
Formulas
Lens
Throw ratio for
FLM HD
Metric formulas (meter) Inch formulas (inch)
TLD HB (0.8 : 1)
0.7
PD = (0.71 x SW ) + 0.05 PD = (0.71 x SW ) + 1.97
TLD (1.2 : 1)
1.1
PD = (1.03 x SW ) - 0.01 PD = (1.03 x SW ) - 0.39
TLD+(1.2:1)
1.2
PD= (1.14 x SW) + 0.11 PD = (1.14 x SW) + 4.33
TLDHB(1.6–2.0
:1)
1.35 – 1.70
PD
min
= (1.36 x SW ) - 0.09
PD
max
= (1.71 x SW ) - 0.13
PD
min
= (1.36 x SW ) - 3.54
PD
max
= (1.71 x SW ) - 5.12
TLDHB(2.0–2.8
:1)
1.70 – 2.42
PD
min
= (1.71 x SW ) - 0.17
PD
max
= (2.42 x SW ) - 0.24
PD
min
= (1.71 x SW ) - 6.69
PD
max
= (2.42 x SW ) - 9.45
TLDHB(2.8–5.0
:1)
2.42 – 4.35
PD
min
= (2.38 x SW ) - 0.16
PD
max
= (4.35 x SW ) - 0.38
PD
min
= (2.38 x SW ) - 6.30
PD
max
= (4.35 x SW ) - 14.96
TLDHB(5.0–8.0
:1)
4.35 – 6.95
PD
min
= (4.17 x SW ) - 0.01
PD
max
= (6.95 x SW ) - 0.29
PD
min
= (4.17 x SW ) - 0.39
PD
max
= (6.95 x SW ) - 11.42
TLD+(7.5 – 11.2 :
1)
6.93 - 10.34
PD
min
= (6.93 x SW ) - 0.2
PD
max
= (10.34 x SW ) - 0.32
PD
min
= (6.93 x SW ) - 7.88
PD
max
= (10.34 x SW ) - 12.60
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 th
e lens lock handle (A) towards the lens power supply socket (B) as
illustrated.
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R59770180 FLM HD20 11/07/2008