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5. Lenses & lens holder
5.7
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 5-15
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.
Scheimp
fl
ug adjustment points
4
1
2
3
d
D
c
C
A
a
B
b
Image 5-16
Scheimp
fl
ug adjustments
4
Free nut
1, 2 and 3
Scheimp
fl
ug adjustment nuts
A, B, C and D Set screws
a, b, c and d
lock nuts
Necessary tools
•
Allen key 3 mm
•
Nut driver 13 mm
•
Nut driver 10 mm
R59770495 DP2K-23B 30/04/2010
53
Summary of Contents for DP2K-23B
Page 1: ...DP2K 23B Installation manual R59770495 00 30 04 2010...
Page 6: ......
Page 37: ...4 Lamp lamp house Image 4 5 Remove lamp house R59770495 DP2K 23B 30 04 2010 31...
Page 47: ...4 Lamp lamp house 4 Reinstall the lamp cover of the projector R59770495 DP2K 23B 30 04 2010 41...
Page 78: ...7 Communicator Touch Panel 72 R59770495 DP2K 23B 30 04 2010...
Page 82: ...8 Starting up 76 R59770495 DP2K 23B 30 04 2010...
Page 90: ...9 Projector registration Image 9 9 Add new owner 84 R59770495 DP2K 23B 30 04 2010...
Page 110: ...10 Removal and installation of the projector covers 104 R59770495 DP2K 23B 30 04 2010...