Aberrations

In an ideal optical system, all rays of light from a point in the object plane would converge to the same point in the image plane, forming a clear image. The influences which cause different rays to converge to different points are called aberrations.

Summary of aberrations and corrections
Index

Lens concepts
 
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Summary of Aberrations

In an ideal optical system, all rays of light from a point in the object plane would converge to the same point in the image plane, forming a clear image. The influences which cause different rays to converge to different points are called aberrations.

Aberration
Character
Correction
1. Spherical aberrationMonochromatic, on- and off- axis, image blurBending, high index, aspherics, gradient index, doublet
2. ComaMonochromatic, off-axis only, blurBending, spaced doublet with central stop
3. Oblique astigmatismMonochromatic, off-axis blurSpaced doublet with stop
4. Curvature of fieldMonochromatic, off-axisSpaced doublet
5. DistortionMonochromatic, off-axisSpaced doublet with stop
6. Chromatic aberrationHeterochromatic, on- and off-axis, blurContact doublet, spaced doublet
Index

Lens concepts

Reference
Meyer-Arendt
Ch 5
 
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