R5906150 /02
XDL
38
Positioning the projector
FLOOR
S
C
R
E
E
N
S
C
R
E
E
N
PD
A
C
D
SCREEN
SW
S
W
S
H
B
S
H
B
C
D
Image 3-5: Positioning the projector
The projector should be installed at right angles (horizontally and vertically) to the screen at a distance PD.
Note the distance (A) between lens centre and table surface is slightly variable. This distance (A) is nominal
223 mm in case all feet are turned in completely and the vertical lens shift is set to zero (0).
On axis / off axis projection
The position of the projector with reference to the screen may also be different depending on the installation.
Basically the projector can be positioned in On-Axis or Off-Axis configuration. On-Axis configuration means
that the projector is positioned so as to have the centre of the lens coinciding with the centre of the screen.
Off-Axis projection is obtained by shifting the lens up, down, left or right. Several parameters can be calculated
determining the position in any installation.
Formula to calculate the distance CD for On-Axis projection:
CD = SH/2 + B - A
Shift range
The lens can be shifted with respect to the DMD (P) which result in a shifted image on the screen (Off-Axis). A
100% shift means that the centre point of the projected image is shifted by half the screen size. In other words,
the centre point of the projected image falls together with the outline of the image in an On-Axis projection.
Due to mechanical and optical limitations it's recommended to keep the shift values within the field of view (F)
as illustrated below. Within these shift ranges the projector and lens perform excellently. Configuring the
projector outside these shift ranges will result in a slight decline of image quality.
The only method to increase the vertical shift range without a decrease in image quality is by shifting the lens
holder itself. For more info on this, see
Additional vertical shift of the Lens Holder
”
, page 40.
Summary of Contents for XDL Series
Page 1: ...ENABLING BRIGHT OUTCOMES Installation Manual XDL ...
Page 8: ...R5906150 02 XDL 8 ...
Page 22: ...R5906150 02 XDL 22 Safety ...
Page 30: ...R5906150 02 XDL 30 System overview ...
Page 50: ...R5906150 02 XDL 50 Pulse Remote Control Unit ...
Page 64: ...R5906150 02 XDL 64 Physical Installation ...
Page 72: ...R5906150 02 XDL 72 Lenses Lens selection ...
Page 80: ...R5906150 02 XDL 80 Scheimpflug ...
Page 94: ...R5906150 02 XDL 94 Input Communication ...
Page 104: ...R5906150 02 XDL 104 WiFi GSM Module ...
Page 116: ...R5906150 02 XDL 116 Getting Started ...
Page 134: ...R5906150 02 XDL 134 Specifications ...
Page 138: ...R5906150 02 XDL 138 Environmental information ...
Page 139: ...139 R5906150 02 XDL Overview video timings for video interfaces C ...
Page 148: ...R5906150 02 XDL 148 Overview video timings for video interfaces ...
Page 155: ...R5906150 02 XDL 155 ...
Page 156: ...Barco NV President Kennedypark 35 8500 Kortrijk Belgium www barco com R5906150 02 2018 11 07 ...