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geometrical optics
chromatism


achromatic combination of two thin lenses placed side by side


Caution
Fill in all input cells.
Choose all parameters unit.
vd1 and vd2 and can be either values or the references of glasses from the catalog.
The achromat is supposed to work for any object position.
Distances are algebric.
Positive direction is according the horizontal arrow in the bottom right of the scheme.

InputValueunit
fi
vd1
vd2
OutputValueUnit
fi1to be calculated
fi2to be calculated
achromatic combination of two thin lenses placed side by side
fi : effective focal length of the combination vd1 : constringence of the first lens vd2 : constringence of the second lens fi1 : average effective focal length of the first lens ( distance from the lens to the back focal point at 587.56 nm ) fi2 : average effective focal length of the second lens ( distance from the lens to the back focal point at 587.56 nm )

Note
This calculation page can not detect all unrealistic inputs.



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