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geometrical optics
focal lengths and principal planes


thick lens interfacing different media


Caution
Fill in all input cells.
Choose all parameters unit.
n0, n1 and n2 can be either values or references of glasses from the catalog. If values only are entered, the wavelength will not be considered.
e is positive.
Raddii and x are algebric or infinite. Enter "infinite" for a plane surface or an object at infinity.
Positive direction is according the horizontal arrow in the bottom right of the scheme.

InputValueunit
n0
n2
n1
R1
R2
e
OutputValueUnit
fto be calculated
fito be calculated
lto be calculated
lito be calculated
ftto be calculated
fbto be calculated
thick lens interfacing different media
n0 : refraction index of the first medium n2 : refraction index of the second medium n1 : refraction index of the lens R1 : radius of curvature of the first surface R2 : radius of curvature of the second surface e : center thickness f : effective focal length in the object space fi : effective focal length in the image space l : distance from the vertex of the first surface to the primary principal plane li : distance from the vertex of the second surface to the secondary principal plane d : distance from the primary principal plane to the secondary principal plane ft : front focal length fb : back focal length

Note
This calculation page can not detect all unrealistic inputs.



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