Barco DP2K-E series User Manual

11. Scheimpflug
11.1 Scheimpflug introduction
What is Scheimpflug?
The lens holder has to be adjus ted so that the “sharp focus plane” of the pr ojected 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 com es 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 know n as Sc heimpflug’s
law. To solve this the lens plane must be placed par allel w ith the DMD plane. This can be achiev ed 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 11-1
Scheimpflug principle
Scheimpflug principle
The "plane of s harp focus" c an be changed so that any plane ca n be brought into s harp focus. W hen the DMD plane
and lens plane are parallel, the plane of sharp focus will also b e parallel to these two planes. If, however, the lens
plane is tilted with r espect to the D MD plane, the plane of s harp focus will also be tilted according to geometrical and
optical properties. T he DMD plane, the principal lens plane and the sharp focus plane will 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 (Sche impflug) nuts and four set screws with lock nut. These screws
and nuts are used for Scheimpflug adjus tment.
1
11
14
4
21
24
13
3
23
2
12
22
Image 11-2
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.
80 R5906693 DP2K-E SERIES 19/06/2015

Barco DP2K-E series Specifications

General

Brand	Barco
Model	DP2K-E series
Category	Projector
Language	English