10. Scheimpflug
10.1 Scheimp
fl
ug introduction
What is Scheimp
fl
ug?
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 occur 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 10-1
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
The front plate of the Lens holder is equipped with four bronze (Scheimp
fl
ug) nuts and four set screws with lock nut. These screws
and nuts are used for Scheimp
fl
ug adjustment.
1
11
14
4
21
24
13
3
23
2
12
22
Image 10-2
1
Scheimp
fl
ug adjustment nuts No1: In
fl
uences the sharp focus plane in the lower left corner of the projected image.
2
Scheimp
fl
ug adjustment nuts No2: In
fl
uences the sharp focus plane in the lower right corner of the projected image.
3
Scheimp
fl
ug adjustment nuts No3: In
fl
uences the sharp focus plane in the upper right corner of the projected image.
4
Scheimp
fl
ug nut No 4: without adjustment functionality.
11
Set screw for nut No1.
12
Set screw for nut No2.
13
Set screw for nut No3.
14
Set screw for nut No4.
21
Lock nut.
22
Lock nut.
23
Lock nut.
24
Lock nut.
Reference 1, 2 and 3 are adjustment points. Reference 4 is a locking point and NOT used during Scheimp
fl
ug
adjustment.
58
R5977692 DP2K-S SERIES 10/12/2012
Summary of Contents for DP2K-S Series
Page 1: ...DP2K S series User and Installation manual R5977692 00 10 12 2012...
Page 38: ...6 Lenses Lens selection 34 R5977692 DP2K S SERIES 10 12 2012...
Page 60: ...9 Starting up 56 R5977692 DP2K S SERIES 10 12 2012...
Page 80: ...11 Convergence 76 R5977692 DP2K S SERIES 10 12 2012...
Page 104: ...12 Lamp House Lamp replacement 100 R5977692 DP2K S SERIES 10 12 2012...
Page 136: ...15 Removal and installation of the projector covers 132 R5977692 DP2K S SERIES 10 12 2012...