If you're going down the street and there's a guy that says: "hey I wanna sell you Fourier lenses they're special lenses" you say: "nope, they're just positive lenses." I love how this lecture actually tries to prepare me for real world out there.
The diffraction pattern created by the wires sets up the light spatially that is input to the lens while the lens actually carries out the Fourier transform. You’re also right though, it focuses the light so that we can actually form an image of the intensity pattern (not the diffraction pattern) at the focal plane of the lens.
I wish my uni explained concepts like you. Instead they decided to explain the same idea with approximately 135 ppt slides (no joke). My attention span and love for optics had almost dissipated. Thank you
Intriguing video! I wonder, in the bottom figure at 11:32, how the pattern on the panel at (f) will change if you shift (Left or right) the position of the object grid?
If you're going down the street and
there's a guy that says: "hey I wanna sell you Fourier lenses they're special lenses"
you say: "nope, they're just positive lenses."
I love how this lecture actually tries to prepare me for real world out there.
Haha I feel so prepared for the real world now 😎
I am so happy. This was the most clear introduction to fourier optics I have come across.
Can't believe I got scammed by the guy selling Fourier lenses at the corner of the street last week.
Hey, I have a fourier lens, wanna buy it?
Nice try, but usually I'm only susceptible to these schemes when I'm walking down the street.
@@verward haha fair enough.
Im a CS major but I found this really cool.
wondering if i should get a minor in physics lol
Excellent explanation on filtering using Fourier optics. Drawings on slides are good
yeah that helped but can you please focus on imaging part more,and how actually the imaging is done using different techniques.
On slide 6, where does the Theta variable come from after calculating the fourier transform?
But isn't the diffraction/ Fourier-Transform happening by the object itself. The lens is just focussing?
The diffraction pattern created by the wires sets up the light spatially that is input to the lens while the lens actually carries out the Fourier transform. You’re also right though, it focuses the light so that we can actually form an image of the intensity pattern (not the diffraction pattern) at the focal plane of the lens.
I wish my uni explained concepts like you. Instead they decided to explain the same idea with approximately 135 ppt slides (no joke). My attention span and love for optics had almost dissipated. Thank you
All thumbs up! Very clear and useful 👍
Intriguing video! I wonder, in the bottom figure at 11:32, how the pattern on the panel at (f) will change if you shift (Left or right) the position of the object grid?
Good one!
What are the full forms of DC and AC in optics?
Great video!
well fancy seeing you here ack daddy
How is everything going?
What should be the focal length value of the lens in Fourier optics? should it be in the fresnel field (near-field) or Fraunhofer field(far-field)?
We have a positive lense in our eyes, so we are always looking at the fouriere transform, just rarely look at coherent light source.
But your retina is at >1f not 1f, so we just get an upside down image on the retina. But maybe if you had a short eyeball
A nice explanation on filtering