Do help me in this regard. ]]>

Thank you for the good information.

I have a question about the phase information in the spectrum of an individual subchannel.

Q. Is phase information of an individual subchannel shown in the spectrum? How are two different subchannels containing different phases distinguished from each other when their center frequencies are the same?

I’d appreciate your answer.

Brian

thank you for your fine example!

I am already familiar with the angular wave spectrum method, like Goodman described it. But I am really interested in your Fraunhofer approximation by angular wavespectrum.

I am having a hard time to understand the following sentence:

“As a result of the near-uniform distribution of the resulting phases, these contributions to A(q) in (4) tend to average to zero and can be neglected.”

- What are the “resulting” phases?

- Why do they follow a near-uniform distribution?

- And how do they average out?

Esspecially why do they only average out for $q_0»\lambda$, if they are uniform distributed shouldn’t they also average out for closer distances?

The backround of my question is, that I have multi slit problem (slits stacked on top of each other), I can easily calculate the field propagation between these slits, but for the last slit the field should be viewed from a greater distance. So I am looking for a way to examine when the Fraunhofer approximation is valid, if I only know the complex field distribution in the upper aperture and the distance!

Thank you!

Dave ]]>

I just downloaded the paper and like the proper citation, I’m thinking about re using it… wonder if Prof. Petermann would care?

]]>Secondly, I have a question which I don’t know the answer: In your article and in my reasoning about the virtual diameter of the bokeh balls we assumed that there is only one lens and an aperture stop on it or outside it. In real cameras one distinguishes between physical aperture and entrance pupil because the system consists of several lenses and the aperture stop is between them… is it true that the relations continue to hold if one uses the entrance pupil as the aperture in the formulas?

]]>Nur ein kurzer, aber gut gemeinter Rat: Bausparen lohnt nicht. Weder von der Verzinsung her (die zumeist schon durch die Inflation aufgefressen wird, noch das vermeintlich günstige Darlehen, welches mir günstige Darlehenszinsen sichert). Schlicht und ergreifend, trotz der hier sensationell ausgeführten Rechnungen, ist ein Bausparvertrag die pure Geldvernichtung. Das fängt schon damit an, dass man für das besagte Produkt noch nichtmal eine Berufsausbildung benötigt.

]]>» imagesc(qx,qy,rho)

However, I got a different result. ]]>