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Lens Geometry Performance Comparison

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Lens Geometry Performance Comparison

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  • Author: Ian Schwartz, Amy Frantz
The ideal: each point on an object being imaged maps perfectly to a point on the image. The reality: aberrations blur perfect image points to larger spots. Though manufacturing tolerances also contribute to performance degradation, these aberrations occur even for a perfectly manufactured lens. Due to the glass property of dispersion, different wavelengths of light experience unique indices of refraction thus are bent by different amounts. Chromatic focal shift (CFS) describes the change in the axial position of focal wavelength.

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