Adjusting The Notch Filter - Barco DP2K-12C Service Manual

8. Light processor assembly
8.15 Adjusting the notch filter
Purpose of the notch filter
The notch filter is a coated glass plate located at the end of the light pipe assembly. The notch filter applies some small color
corrections of the light coming out of the light pipe, which is emitted by the xenon lamp of the projector. This is done to achieve an
optimal color calibration of the native colors. The notch filter can slightly turn, with respect to the light path, which allows a small
adjustment of the native colors. Note that, next to the pure optical color calibration by the notch filter, there is also a software color
calibration.
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Image 8-24
Color gamut.
Target range for x, y Chroma values
• Uncorrected GREEN: (changes together with red)
- x : 0.245 – 0.285
- y : 0.67 – 0.71
• Uncorrected RED: (changes together with green)
- x : 0.67 – 0.69
- y : 0.31 – 0.33
• Uncorrected BLUE: (no impact)
- x : 0.12 – 0.16
- y : 0.02 – 0.8
To access the notch filter, the left side cover has to be removed from the projector. This procedure assumes
that the left side cover is already removed from the projector.
Necessary tools
No tools.
How to adjust the notch filter
1. Release the Thumb screw (reference 1) of the notch filter.
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R5905043 DP2K-12C/11CX 19/02/2018