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geometrical optics
miscellaneous concerning paraxial conjugation


maximum defocus for a given object and an optical system


Caution
Fill in all input cells.
Choose all parameters unit.
D, Dr and ds are strictly positive. Other distances and dimensions are algebric.
Positive direction is according the horizontal arrow in the bottom right of the scheme.

InputValueunit
fi
D
Dr
s
OutputValueUnit
sito be calculated
dsito be calculated
maximum defocus for a given object and an optical system
fi : effective focal length D : clear aperture Dr : maximum diameter of the image spot s : algebric distance from the primary principal plane to the object plane si : algebric distance from the secondary principal plane to the image plane dsi : maximum defocus in the image space

Note
This calculation page can not detect all unrealistic inputs.



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