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Published byZakary Dorcey Modified over 2 years ago

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Range from Focus Based on the work of Eric Krotkov And Jean Paul Martin

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Problem statement

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Problem statement cont.

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Theory of Defocus

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The Optical Transfer Function

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Wave Aberation

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The Object plane, the image plane and the pupil planes

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The Wave aberation QQ

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A different choice of reference system for wave aberation

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Notation

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The displacement of the detector plane is = to introduction of wave aberation by amount

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In terms of the amount of defocus

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Figure 2. Cross-section of the OTF of a defocused incoherent system

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Focus Quality

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Focus criterion functions

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Focus criterion functions cont.

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Implementation

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Search Strategy

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Fibonacci search technique

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The search Algorithm

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Computing the range

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Thin lens geometry

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Computing the range

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Algorithm

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Limitations

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The effect of depth of field

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Focus data

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Range errors

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