Weighting for the Modulation Transfer Function.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The effects of turbulence on the performance of imagers or on beam forming, optical systems are well expressed by the optical transfer function OTF or its magnitude, the modulation transfer function MTF. It has been shown that the MTF can be expressed in terms of the Fried model by means of a single number, the turbulence structure constants for optical index, C sub n to the 2nd power, provided that a properly path weighted value is obtained. Based on current theory the weighting needed in the path-position weighted value of C sub n to the 2nd power is a function of zz sub 0 raised to the 53 power, heavily emphasizing the region near the imaging system or beam forming optics. It is the conclusion of this report, that the path weighting function Z sub 0 raised to the 53 power is correct. Author
- Atmospheric Physics
- Statistics and Probability