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Aberrations

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Aberrations

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  • Author: Gregory Hollows, Nicholas James
Optical aberrations are performance deviations from a perfect, mathematical model. It is important to note that they are not caused by any manufacturing flaws—physical, optical, nor mechanical. Rather, they are inherent in lens design and are due to diffraction, refraction, and the wave nature of light. As such, there is no “perfect” lens. Effects from various aberrations in a lens design are ultimately seen in performance and affect modulation transfer function (MTF), spot size, telecentricity, depth of field (DOF), and others. Aberration theory is an abstract and complex subject. However, understanding how aberrations affect performance is important for success with an application.

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