Barco DP2K SLP Series User Manual

10. Scheimpflug
10.1 Scheimpflug introduction
What is Scheimpflug?
The lens holder has to be adjusted s o that the “sharp focus plane” of the projected image falls together with the plane o f 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 com es to the DMD plane the further the sharp focus plane will be. It can occur t hat you won’t be able to get a complete focused
image on the s creen due to a tilt (or swing) of the lens plane with re spect to the DMD plane. T his is also known as Scheimpflug’s
law. To s olve this the lens plane m ust be placed parallel with the D MD plane. This can b e achieved by turning the lens holder to
remove the tilt (or swing) between lens plane and DMD plane (Lp3→Lp4).
SCREEN
DMD
Lp1
Lp2
Fp1
Fp2
SCREEN
DMD
Lp3
Lp4
Fp3
Fp4
(Scheimpflug)
Image 10-1
Scheimpflug principle
Scheimpflug principle
The "plane of s harp focus" c an be changed so that any plane ca n be brought into sharp focus. When the DMD plane
and lens plane are parallel, the plane of sharp focus will als o be parallel to these two planes. If, h owever, the lens
plane is tilted with r espect to the D MD 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 w ill intersect in a line below the
projector for downward lens tilt.
Scheimpflug adjustment points
The front plate of the Lens holder is equipped with four bronze ( Scheimpflug) nuts and four set screws with lock nut. T hese screws
and nuts are used for Scheimpflug adjustment.
1
11
14
4
21
24
13
3
23
2
12
22
Image 10-2
1Scheimpflug adjustment nuts No1: Influences the sharp focus plane in the lower left corner of the projected image.
2Scheimpflug adjustment nuts No2: Influences the sharp focus plane in the lower right corner of the projected image.
3Scheimpflug adjustment nuts No3: Influences the sharp focus plane in the upper right corner of the projected image.
4Scheimpflug 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 Scheimpflug
adjustment.
94 R5906847 DP2K SLP SERIES 02/06/2017

Barco DP2K SLP Series Specifications

General

Brand	Barco
Model	DP2K SLP Series
Category	Projector
Language	English