Aberrations - Aberrations Chromatic is due to the fact that...

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Aberrations Chromatic – is due to the fact that the refractive index of lenses, etc. varies with wavelength; therefore, focal lengths, imaging conditions, etc. are wavelength-dependent •G e o m e t r i c a l – are due to the deviation of non-paraxial rays from the approximations we have used so far to derive focal lengths, imaging conditions, etc.; therefore, rays going through imaging systems typically do not focus perfectly but instead scatter around the “paraxial” (or “Gaussian”) focus
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Chromatic Aberration (aka dispersion )
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Geometrical aberrations
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Primary (Seidel) aberrations Spherical Coma Astigmatism Field curvature Distortion
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Spherical
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Coma
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Simultaneous compensation of spherical and coma, using the lens form factor
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field curvature astigmatism
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Distortion
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Exact ray-tracing Optical design
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Exact ray-tracing ray scatter diagram ( defocus) Optical design
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Optical design ... ... ... S4 ... ... ... S3 0.1 1.0 -21.6 S2 0.001 1.54 21.6 S1 0.1 1.0 Inf S0 Distance to next element Index to the right Curvature
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Aberrations - Aberrations Chromatic is due to the fact that...

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