83
2.5. Axial symmetry
Figure 2.11: Isotropic distortion, (a) pincushion, (b) barrel.
Figure 2.12: Anisotropic distortion, (a) positive, (b) negative.
distortion are plotted in Figure 2.12. Anisotropic distortion results
in an azimuthal displacement of the image point by an amount
which is proportional to the cube of the radial distance off axis.
The aberrations represented by the terms proportional to F and f
2.5. Axial symmetry
Figure 2.11: Isotropic distortion, (a) pincushion, (b) barrel.
Figure 2.12: Anisotropic distortion, (a) positive, (b) negative.
distortion are plotted in Figure 2.12. Anisotropic distortion results
in an azimuthal displacement of the image point by an amount
which is proportional to the cube of the radial distance off axis.
The aberrations represented by the terms proportional to F and f