I do appreciate if anybody share the following article with me.

Zernike Expansion of Separable Functions of Cartesian Coordinates

Colin J. R. Sheppard, Sam Campbell, and Michael D. Hirschhorn
Applied Optics, Vol. 43, Issue 20, pp. 3963-3966 (2004)
http://dx.doi.org/10.1364/AO.43.003963
http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-43-20-3963

Thanks
:-)

Hi Rahbar,

I can access that, do you want to PM me your email address?

Maccle