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Very nice! I subscribed to your channel as I am working on a planetarium projector where I need to make 32 "star plates" lithographically. Some of the pin holes are in the tens of microns. I want to approach this with direct write laser lithography by adjusting the focus of 405nm laser into a microscope lens at a fixed height over an XY stage. This should allow me to expose a photoresist on aluminized glass and make pinholes of various sizes. We'll see... I think I am going to need to come up with something similar, as the XY stage will take some time to move to the next pin hole exposure position and could gather dust in that time.

I like watching your videos on Optics. You describe things very well.

Top notch stuff! I never fail to be impressed. Carry on, sir!

So light creates matter ok so . Why no one is talking about the photon belt? Someone out there help me on this phenomena has vanished from our knowledge.

Super cool...

I just watched a two-video lecture series on interferometry in radio-astronomy. Since both optics and radio leverage photons (at different frequencies), we would expect the physics to be the same... but it's amazing to draw the parallels in practice, especially regarding the importance of Fourier transforms.

I always wondered what causes this phenomena. Thank you!

Photon has mass

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What if u have identical beam from left , can the splitter cause perfect cancellation interfernce ?

U say packets are a result of interference of wide spectrum emission .. great !! ... But when the photo electric effect happens , only one frequency is absorbed . So how the receiving sensor had seen a single frequency packet ? 🤔 ... How about single frequency light sources too ? .. will they be seen as packets on the receiver end ?

Simple and elegant!!! 👏🏻

I almost fell off my chair in the end. Thank you.

Nice informations, thanks

that was really interesting, so thanks for this video! Out of curiosity - wouldn't this in theory allow to create something like a "CPU", but based on light? Basically providing already "hardcoded" functions like adding numbers, subtracting them, dividing them, etc? Would be cool to see if doing calculations that way would be way faster than doing it like we do it currently with our electronic devices or if something would prevent us from implementing such a complex pattern / "optical calculation chip".

Silicon oxide is very poorly suited for such optical circuits. Beryllium fluoride or boron fluoride are the best options. because these compounds do not absorb in the visible spectrum. Borosilicate stacks also work well.

Isn't this essentially how a fresnel lens works?

this is a good review!!! I have already encountered similar simulations of interference of electromagnetic waves with short wavelengths. There are several unexplored aspects in this problem, namely, the materials (chemical elements) and the thickness of the crystal structures of the diffraction slits and the mask material of the photo lithographic template itself are not taken into account.

I have lot of questions about this technology ) 1. What is difference between meta lenses and flat holograms? 2. Why are they called "meta lenses"? 3. How they are made? 4. How hard to make them big and use at practice? 5. If they are sensitive to environment, what type of disturbing they can detect more effective? 6. Is there way to make them wide band? 7. How far can they bend a rays? Can they work as prisms? 8. Whats happens if cover part of the lens? 9. What happens if place two lenses on each other and move, rotate one of them? Thank you very much in advance!

If any of this gravitational effecr on light is true and not electromagnetic field or actual crystal lensing refraction,? How can you explain the convergence of incoming light from the moon during a paraselene? There is no powerful star between or eye and the moon..how can if still offer convergence? If you are about to offer the ice crystals in upper atmospheric phenomenon? Then i must remind you that these are only available on full moons suggesting synchronicity to the great cycle and not ice crystals..secondly..if light lensing of convergence coming in from moon? Then the opposite effect of such lensing would need be applied to our eye when looking out ..won't you agree? Lense works both ways..so? The opposite of convergeance lense in your optics studies and from observation of incoming converged light,what would your first guess on the type of geometry this lense would consist if such notion was a potential?

This is too cool.

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would it be fair to say that the parts between mirror and beam splitter are standing waves?

how did you create this simulation? i would love a video or any pointers as an optics student myself!

Intersting!

How good do meta lenses perform compared with traditional ones? I saw a few videos where they were hyped, do they really have such a huge potential? I wonder what we have to expect in the next years

what software do you use to make the optical simulations?

great to learn about this. Are Fersnel lenses considered as a really old meta lens?

Witchcraft!

Cool!

Extremely informative and entertaining.

Reminds me of zone plate coded "lenses" used to form images with x-rays!

Your videos are soooo interesting!! Wish you to introduce more various metasurfaces!!

What about sending the photons past a slit that is only one atom thick. Like a single graphene layer?

I remember doing this in my physics class at Uni. Always remember it. One thing I would like to see demonstrated is the observer effect causing the reversion from interference to individual photon distribution

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Excellent ❤❤❤

If there is refraction, shouldn't there be reflections? Shouldn't we be able to use detected gravity frequency chirps as radar imagers?

This is a bit more complicated.

Thanks

How to measure the wavefront error of proximity corrected objective lens?

But how is the first one made? I mean so lets say they designed a new chip. How would they take that CAD version of it and write it to the wafer? I dont understands.

My company Akhetonics is working on this very thing! Check us out. We are aiming to do optical logic in integrated photonics

In your coherent light source,what is the block next to the light i see two adjustment screws,is that pinhole or some other lens, as it is shown pinhole was sticked on to the top of LED bit confused.

Since it is stated that weight affects the path of light, I don't know how we can draw an absolutely straight line.

Fascinating video! The effort you put in there to create such unique and informative content has my highest respect.

i make dichroic glass marbles, I am trying to make dichroic glass that i can heat in a flame , bright colors that like purples/blues , i usually use a rainbow coated glass. That's what i am trying to make , i bought a old pvd machine and am in process of learning

Was looking for a good way to align mtf charts with a lens, your nail+HD method is so much better and fail proof that what I came up with, adopted!

Asianometry watchers be like "meh, nice intro. Bring it on." ;-)

you can make oleds by spin coating