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R5906150 /02
XDL
74
7.1 Scheimpflug introduction
What is Scheimpflug?
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 Scheimpflug'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).
Image 7-1: Scheimpflug principle
Scheimpflug 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.
Scheimpflug adjustment points
The front plate of the Lens holder is equipped with four bronze (Scheimpflug) nuts and four set screws with
lock nut. These screws and nuts are used for Scheimpflug adjustment.
Summary of Contents for XDL Series
Page 1: ...ENABLING BRIGHT OUTCOMES Installation Manual XDL ...
Page 8: ...R5906150 02 XDL 8 ...
Page 22: ...R5906150 02 XDL 22 Safety ...
Page 30: ...R5906150 02 XDL 30 System overview ...
Page 50: ...R5906150 02 XDL 50 Pulse Remote Control Unit ...
Page 64: ...R5906150 02 XDL 64 Physical Installation ...
Page 72: ...R5906150 02 XDL 72 Lenses Lens selection ...
Page 80: ...R5906150 02 XDL 80 Scheimpflug ...
Page 94: ...R5906150 02 XDL 94 Input Communication ...
Page 104: ...R5906150 02 XDL 104 WiFi GSM Module ...
Page 116: ...R5906150 02 XDL 116 Getting Started ...
Page 134: ...R5906150 02 XDL 134 Specifications ...
Page 138: ...R5906150 02 XDL 138 Environmental information ...
Page 139: ...139 R5906150 02 XDL Overview video timings for video interfaces C ...
Page 148: ...R5906150 02 XDL 148 Overview video timings for video interfaces ...
Page 155: ...R5906150 02 XDL 155 ...
Page 156: ...Barco NV President Kennedypark 35 8500 Kortrijk Belgium www barco com R5906150 02 2018 11 07 ...