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9.3 Replacing the Protective Window
After extended periods of processing, the protective window can become dirty or damaged which can
affect the quality of the laser beam. This ultimately can also affect the quality of the process. For Mid
and High-Power Scanners, the Window Assembly contains an individual glass element. This glass
element is a consumable and is designed to be replaced when it becomes dirty or damaged.
Replacement of protective windows requires disassembly and assembly to be
performed in a dust free environment with appropriate handling and cleaning
supplies for optics.
Every application has different requirements when it comes to the cleanliness of the protective window.
This means that it is up to the user to determine what is too much contamination for their specific
process. This can be done through observation of the protective window after so many cycles of the
system or the Dirty Window Sensor can be utilized to alert the user when the protective coverslides
contamination threshold is exceeded. Figure 9-1 provides two general examples of protective window
contamination.
The Dirty Window Sensor allows users to setup threshold values based on their
specific process. IPG does not provide these thresholds given that they are process
specific. Please refer to accompanying documentation for Dirty Window Sensor
use.
Figure 9-1 Window Contamination Examples
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