Thick lenses systems
The optical matrix formalism is applied to find parameters such as focal distance, back and front focal points, principal planes, and the equation relating object and image distances for a thick spherical lens immerse in air. Then, the formalism is applied to systems compound of two, three and N thick lenses in cascade. It is found that a simple Gaussian equation is enough to relate object and image distances no matter the number of lenses.
physics.optics↗