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close and then move to 8 rows. Ensure that the 8 rows is also Flat Fielded to the same
target as 12 rows.
DN
DN
This method is not effective for CCD TDI cameras with many stages as there is insufficient
sensitivity. Area mode imaging is required. Single line cameras would be too sensitive.
However, the Piranha XL camera has the right number of rows to make this simple alignment
method practical.
38 •
Line Profile of White/Illuminated Area
200
100
Flat Field to a Target of 200DN
200
100
Adjust Camera in Scan Direction Towards Black/
200
White Transition Until Line Center is 100DN
100
Adjust Camera Rotation To Make Line Profile Flat
200
100
Adjust Camera In Scan Direction To Bring Line
Flat Profile to 100DN
200
100
Figure 10 Alignment Method
Pixel #
16352
Pixel #
16352
Pixel #
16352
Pixel #
16352
Pixel #
16352
The Piranha XL XDR Camera
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