Figure 4
Geometrical distortion observed with a grid pattern (0.20 mm pitch). (a) Part of the grid pattern recorded with the lens-coupled detector. A small area at the upper-right corner of the view is shown. The lines are drawn for guidance. (b) Part of the grid pattern recorded with the fiber-coupled detector. An area at the center of the view is shown. The dots are aligned parallel to the left and right edges of the image but not to the top and bottom edges. |