Optics Instrumental with thins lens

[Adams James]

Homework Statement

In a thick lens, how we do to get the primary and secondary principal planes

Homework Equations

(1/Si)+(1/So)=1/f

The Attempt at a Solution

I tried to get to get that with the Newtonian equation

 

[rude man]

Homework Statement

In a thick lens, how we do to get the primary and secondary principal planes

Homework Equations

(1/Si)+(1/So)=1/f

The Attempt at a Solution

I tried to get to get that with the Newtonian equation

http://en.wikipedia.org/wiki/Focal_length