Dukane 28A8932 - Manual (Page 17)

7
The bottom of the image can move from half way below the pro-
jector’s lens (Figure 5) to parallel with the lens (Figure 6).
Example: With a 10’ image, at the lowest projection angle, the bot-
tom of the image is 5’ below the projector’s lens; at the highest
projection angle, the bottom of the image is parallel with the lens.
F IGURE 5
Lowest image projection angle
F IGURE 6
Highest image projection angle
Once you know the diagonal image size, you can figure out the
width and height using these formulas:
width (inches) = diagonal (inches) x 0.8
height (inches) = width (inches) x 0.75
L L In out In In L BNC BNC R R R
A 0 A 0 R
s R G G B B
10’ high
image
bottom of image
5’ below lens
H
lens center
L L In out In In L BNC BNC R R R
A 0 A 0 R
s R
G
G
B
B
10’ high
image
bottom of image
parallel with lens
lens center