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geometrical optics
focal lengths and principal planes


paraxial parameters of a combination of thin lenses


number of lenses
paraxial parameters of a combination of thin lenses
fik : effective focal length of lens number k dk : distance from the lens number k to the lens number k+1 fi : effective focal length of the combination l : distance from the first lens to the primary principal plane of the combination li : distance from the last lens to the secondary principal plane of the combination ft : front focal length of the combination fb : back focal length of the combination L : distance from the primary principal plane to the secondary principal plane

Note
This calculation page can not detect all unrealistic inputs.



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