Barco DP2K-12C, Service Manual

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10. Integrator rod
10.1 Introduction
Functionality of the integrator rod
The integrator rod is made of fused silica. The cross-section of the rod has the same aspect ratio as the active surface of the DMD’s
used in the light processor. The function of the integrator rod is to match the shape of the light path to the shape of the DMD’s and
to neutralize the hot spot effect caused by the light source. Futhermore, the integration rod ensures that the light beam is focused
on the DMD’s, which results in an optimally focused light beam on the screen.
The integrator rod is located at the entrance of the light pipe. The light emitted by the lamp is re fl ected via the “cold mirror” into the
rod, which integrates the incoming light into a homogeneous rectangle shaped beam of light.
Image 10-1
The entrance and exit side of the integrator rod are coated to achieve optimal performance. Clearly the rod may never be con-
taminated with grease, dirt, liquid or the such. for optimal protection the rod is mounted inside an aluminium tube, which requires
replacing together with the rod. This aluminum tube also contains an adjustment mechanism to position the rod inside the light pipe.
The integrator rod, the aluminium tube and the adjustment mechanism together form the “integrator rod assembly”.
C
AUTION
:
Use cotton gloves to handle the integrator rod. Greasy fi ngerprints or other dirt on the integrator
rod will burn into the rod and cause permanent damage.
168 R5905043 DP2K-12C/11CX 19/02/2018