Optimal FSTOP/Resolution Apparatus and Method for Specified Depth-of-Field
Patent application, Filed 17 May 2000
DEPARTMENT OF THE NAVY WASHINGTON DC
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A method and apparatus to determine the fsub stop that provides optimal image resolution for a predetermined depth-of-field. An approximate and exact method and apparatus are provided to determine the optimal resolution fsub stop. The optimal resolution fsub stop is a function of the lens focal length, depth-of-field in front of the object, wavelength of light, and distance of the object to the lens center. Once the optimal resolution fsub stop is determined, the camera is adjusted to the closest discrete fsub stop available. When the approximate field technique is utilized, the camera must be adjusted to the discrete fsub stop closest to, but not exceeding, the computed fsub stop.