Re: PSF function.. and convolution help needed

On Apr 15, 7:09 am, "Charles Manoras" <inco...@xxxxxxxxxxxxx> wrote:
"Marc Reinig" wrote

The PSF (Point Spread Function) of an optical system is what the system
does to a point source object in the process of imaging it.  For a round
pupil with no aberrations in the system it will be a sync squared function
( ( sin(x)^2 ) / ( x^2 ) whose extent is a function of the diameter of the
pupil and the focal length of the system.  This function has a central
bright core and a series of dark rings and decreasing intensity bright
rings around it.

Oops...

Pls have a look athttp://en.wikipedia.org/wiki/Airy_disk

(among many such references, links etc.)

no sine (or sinc) here but the Bessel function J1   (J sub 1) etc.

The above applies to a square or rectangular pupil (also with the
appropriate variables x and y).

As told before, see Hecht... although here it's more likely to be a
"slip of the keyboard" and not a mistake given the author's expertise
in the field.     :-)

Thanks you all for your time to explain this matter,
I will go to the books, read some more, use what you wrote here, and
will come back.

also. after seeing how pro people here , I think I will also stay :)

Thanks
(again)

.