How do dark spot and tiny hole filters affect Fourier optics images?

[George444fg]

Homework Statement

George44fg

Relevant Equations

Fourier Transform Equations

I was assigned an experiment of Fouriers optics where I have to use different Filters. One of them was the dark spot and the tiny hole. As of my understanding, for tiny hole, we cut off all high-frequency light related to diffraction and refraction, thus using only the low freuency part of the initial image. The result would be a limited yet very clear image on the screen. While for the black spot we cut off the concentrated beam and project only the high frequency diffracted and refracted beams. Thus we get a rather unclear image? Thank you in advance

 

[Tom.G]

How about you run the experiment and then any problems or results you have can be discussed if needed?

 

[George444fg]

How about you run the experiment and then any problems or results you have can be discussed if needed?

I've already done the experiment, and everything is fine. However, I would like to be sure about the theoretical understanding of the filtering process.

 

[Tom.G]

Homework Statement:: George44fg
Relevant Equations:: Fourier Transform Equations

...for tiny hole, we cut off all high-frequency light related to diffraction and refraction, thus using only the low freuency part of the initial image.

...the black spot we cut off the concentrated beam and project only the high frequency diffracted and refracted beams.

I agree!

 

[George444fg]

I agree!

I thank you a lot.