5. Lenses & lens holder
Image 5-19
If no, use the
zoom barrel
on the lens to zoom in or out.
How to focus?
1. Use the “+” and “-”
focus keys
on the local keypad to focus the image on the screen.
Image 5-20
5.6
Scheimp
fl
ug adjustment
What has to be done ?
The lens holder has to be adjusted so that the “sharp focus plane” of the projected image falls together with the plane of the screen
(Fp1
→
Fp2). This is achieved by changing the distance between the DMD plane and the lens plane (Lp1
→
Lp2). The closer the lens
plane comes to the DMD plane the further the sharp focus plane will be. It can sometimes happen that you won’t be able to get a
complete focused image on the screen due to a tilt (or swing) of the lens plane with respect to the DMD plane. This is also known
as Sheimp
fl
ug’s law. To solve this the lens plane must be placed parallel with the DMD plane. This can be achieved by turning the
lens holder to remove the tilt (or swing) between lens plane and DMD plane (Lp3
→
Lp4).
SC
R
E
EN
DMD
Lp1
Lp2
Fp1
Fp2
SC
R
E
EN
DMD
Lp3
Lp4
Fp3
Fp4
(Scheimpflug)
Image 5-21
Scheimp
fl
ug principle
Scheimp
fl
ug principle
The "plane of sharp focus" can be changed so that any plane can be brought into sharp focus. When the DMD plane
and lens plane are parallel, the plane of sharp focus will also be parallel to these two planes. If, however, the lens
plane is tilted with respect to the DMD plane, the plane of sharp focus will also be tilted according to geometrical and
optical properties. The DMD plane, the principal lens plane and the sharp focus plane will intersect in a line below the
projector for downward lens tilt.
R5905067 DPXK-19B/23B/P 17/09/2012
51
Summary of Contents for DP2K-19B
Page 6: ......
Page 14: ...1 Safety 8 R5905067 DPXK 19B 23B P 17 09 2012...
Page 22: ...2 General 16 R5905067 DPXK 19B 23B P 17 09 2012...
Page 32: ...3 Physical installation 26 R5905067 DPXK 19B 23B P 17 09 2012...
Page 62: ...5 Lenses lens holder 56 R5905067 DPXK 19B 23B P 17 09 2012...
Page 76: ...7 Communicator Touch Panel Image 7 8 Connections 70 R5905067 DPXK 19B 23B P 17 09 2012...
Page 78: ...8 Starting up 72 R5905067 DPXK 19B 23B P 17 09 2012...
Page 100: ...10 Removal and installation of the projector covers 94 R5905067 DPXK 19B 23B P 17 09 2012...
Page 120: ...A Specifications 114 R5905067 DPXK 19B 23B P 17 09 2012...
Page 124: ...B Pin configurations 118 R5905067 DPXK 19B 23B P 17 09 2012...