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.

@QuintinMassey

15 күн бұрын

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.

Excellent explanation on filtering using Fourier optics. Drawings on slides are good

All thumbs up! Very clear and useful 👍

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)?

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

A nice explanation on filtering

On slide 6, where does the Theta variable come from after calculating the fourier transform?

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?

How is everything going?

Hey, I have a fourier lens, wanna buy it?

@verward

3 жыл бұрын

Nice try, but usually I'm only susceptible to these schemes when I'm walking down the street.

@x87alpha1

3 жыл бұрын

@@verward haha fair enough.

yeah that helped but can you please focus on imaging part more,and how actually the imaging is done using different techniques.

Great video!

@danieleng1996

5 жыл бұрын

well fancy seeing you here ack daddy

What are the full forms of DC and AC in optics?

Good one!

Im a CS major but I found this really cool. wondering if i should get a minor in physics lol

But isn't the diffraction/ Fourier-Transform happening by the object itself. The lens is just focussing?

@QuintinMassey

15 күн бұрын

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.

Can't believe I got scammed by the guy selling Fourier lenses at the corner of the street last week.

We have a positive lense in our eyes, so we are always looking at the fouriere transform, just rarely look at coherent light source.

@daveb3910

Жыл бұрын

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