Shooting an electron beam through air
14:05
Holograms on chocolate
16:48
4 жыл бұрын
Пікірлер
@vojko0031
@vojko0031 13 сағат бұрын
Glass thickness of the capillary could be the main reason for the lower value🤔
@MrMotchel
@MrMotchel 17 сағат бұрын
I love the stuff you do with optics! It's always a good day when I see a new video from you. Thank you for making such awesome, interesting, & intellectual videos for all of us, the internet strangers {the public} & free of charge(!), other than having internet access. I think a patreon sub to you is well deserved by now, considering i've rewatched every video you've posted multiple times. Hope you have a great day Ben! Your constant curiosity and technical knowhow is inspiring.
@jbiasutti
@jbiasutti 17 сағат бұрын
On your discussion of F number you have hit the nail on the head. Numerical aperture is defined as 1/2F, because the approximation works. The old saw of at low x, sin(x) = x is still being used everywhere. So for professional lenses they keep using the same old formula even though it's wrong.
@TangerineJuice.
@TangerineJuice. 17 сағат бұрын
I'm excited to see how this project will evolve with the added input of the comment section!
@Alexander_Sannikov
@Alexander_Sannikov 17 сағат бұрын
i guess i watched this video so long ago, than now watching it again i can pretend it's almost new to me. give it 2-5 more years and I can safely start rewatching Applied Science videos to re-live the joy.
@lorenzo42p
@lorenzo42p 18 сағат бұрын
you should have a second channel for raw content. I'd watch. put it on while I'm working, listen to it in the background.
@AirCommandRockets
@AirCommandRockets 18 сағат бұрын
Very interesting! I can see something like this useful for very high speed cameras where you need to gather as much light as possible.
@theslowmoguys
@theslowmoguys 19 сағат бұрын
Super interesting. I feel like everyone on KZbin who does high speed is looking at that f number like 😮
@mlgsamantha5863
@mlgsamantha5863 20 сағат бұрын
3:20 Would it be possible to inject the oil underneath the glass instead delidding the sensor completely and risking it in the process?
@이재하-s4s
@이재하-s4s 21 сағат бұрын
Good explanation, now I finally feel like understanding impedance matching. Thanks
@oorcinus
@oorcinus 22 сағат бұрын
The oil coupling made me think "oil is for spatial impedance matching" and now i can't shake that thought even though it doesn't sound right.
@RiffZifnab
@RiffZifnab 22 сағат бұрын
We used to work at the same company a couple of years ago. If you're still there good luck, I hear things aren't great.
@n1cad
@n1cad 22 сағат бұрын
you basically invented rifle scopes
@ForestSchweitzer022097
@ForestSchweitzer022097 23 сағат бұрын
great stuff! thanks
@ThomasShue
@ThomasShue Күн бұрын
I wish I should speak during this video. Lol
@ThomasShue
@ThomasShue Күн бұрын
F-stop of a lens is measured by dividing the focal length of the lens by the diameter of its aperture. As to “being focused down” is not correct. You can only measure the distance away from center where image remains SHARP. That Laser was sharp when in the center, but as you move out you can clearly see that the dot is no longer sharply being resolved. Sure it’s focused, but it’s not sharp. So you can’t make the measurements the way you did and call it a f.05. It’s not just contrast either, colors will also be come distorted Lens F stop is the distance between the optical center of the lens and the point on the camera sensor where light converges to form a SHARP IMAGE. Manufacturers have been fudging numbers for years. I have many fast lenses, and they all have the same exact relationships, the faster the lens, the shallower the depth of field, example of 85mm f1.2 lens on a 35mm sensor if you focus on the eye of a subject, the tip of the nose and ears will be out of focus. Use that same lens on a 4/3 sensor, crop factor, the DOF will be less shallow. There are many factors involved and making fast glass that resolves on a microscope vs fast glass for an 8x10 field camera is a wold apart. The relationships between the sensor and the DOF are a HUGE consideration. That is because You can only measure the distance away from center where image remains SHARP this is your downfall in my barely educated opinion.
@Farquare
@Farquare Күн бұрын
Have you considered that the objective you are using is infinity corrected? Older objectives require specific optical tube lengths (distance to the eyepiece) to work correctly, while newer objectives are often infinity corrected, meaning that the distance to the eyepiece literally does not matter. For older objectives, the overall magnification and chromatic aberration change with optical tube length, but newer objectives totally remove that characteristic. I have a large research microscope from the mid 1970s and changing the interocular distance (distance between your eyepieces) alters the magnification slightly, while a much newer microscope will not do that. If you look at the nomenclature on the objective, you should see something like "Plan Oel 100X" and "210/0.15". In this example, the 210 is the optical tube length in mm, which may have an infinity sign, and the 0.15 is the coverslip thickness. "Plan" means that it is corrected for a flat field of view, which you definitely want. Otherwise, only the central 70% or so will be in focus, with the periphery out of focus.
@ThomasShue
@ThomasShue Күн бұрын
Close focus (focal distance) and DOF is way different! Also DOF and sensor size relationship in how images are resolved
@ThomasShue
@ThomasShue Күн бұрын
The faster the lens (lower F stop) the shallower the DOF (depth of field), however the aperture blade count has a direct effect on how the DOF resolves an image. In laymen’s terms the blurry area in high contrasting areas will not be round (spherical). They will look flat sides, so the higher count of aperture blades the better, better yet don’t use an aperture and use iso and shutter speed to control exposure.
@ThomasShue
@ThomasShue Күн бұрын
F-STOP = “F Number”.
@awesomefeldmanfamily
@awesomefeldmanfamily Күн бұрын
Do you ever use Claude? It's really really good
@duffman7674
@duffman7674 Күн бұрын
It looks like the "you pass butter" robot in the thumbnail.
@larryshaver3568
@larryshaver3568 Күн бұрын
a 4.5k resistor would work better
@lumotroph
@lumotroph Күн бұрын
Cool!!
@gfabasic32
@gfabasic32 Күн бұрын
A man, a plan, a Canadian. (Inspired by this palindrome: "A man a plan a Canal Panama" )
@emativede
@emativede Күн бұрын
Amazing! Bravo!
@ross9263
@ross9263 Күн бұрын
Another strategy you can use is fill the area behind the glass with oil?
@ryanreedgibson
@ryanreedgibson Күн бұрын
Why doesn't this video have more likes? Great channel.
@romanowskis1
@romanowskis1 Күн бұрын
Asianometry told story about high NA process used in photolithography. Each times when light goes thru two materials with different optical density part of the light is reflected back. Oil immersion reduce the impedance missmatching between cmos sensor and camera lenses. Each times when light pass thru by border between two different materials it can absorb (of reflect) 5% of light. 3 lenses on optical path means 6 times when light change propagation medium and it can delivery only 72 % of initial light.
@BardCanning
@BardCanning Күн бұрын
could the lens element be adhered directly to the chip to avoid the need for oil?
@stevensgarage6451
@stevensgarage6451 Күн бұрын
Like PATS
@tetraktys6540
@tetraktys6540 Күн бұрын
Good on you man, make the engineers work for it. Great work.
@KostyaShkedrov
@KostyaShkedrov Күн бұрын
Does the Fresnel lens that you have with f/#=0.5, which is not corrected for aberrations, follow the blue line of sin(artan) at 14:35? Or at least deviates from the sin(asin) line significantly?
@davidewing9088
@davidewing9088 Күн бұрын
YOU ARE BACK!!!
@MediaDivision
@MediaDivision Күн бұрын
Very interesting. The fastest lens withe larges image circle you can buy without spending an arm and a leg is the 100mm Zeiss Biotar f0.73 X-Ray lens that cover 6xF medium format (IMAX). You get those around 500$ on ebay. We used that one for our "f07" KZbin episode (as filmmakers we approach this from a more artistic then scientific angle but still dive a little into physics). The back focus is something like 4mm at infinity when a smith lens (field flattener) is applied. I am doubtful that you can reduce the focal length to get all that light onto MFT sensors. My understanding is, that at f0.5, the image is inside the lens... with a plano convex rear element and oil you could potentially bring your sensor there, but how would you go faster? f0.5 is deemed the limit for that reason. Well, if you want to try, the 100mm Zeiss Biotar f0.73 could be a good srting point. If you are interested in how the images look, check out our episodes... we got a f0.3 episode, too, but that is about using the equivalency of lenses to create unique images. If you are able to build something functional... we would love to collaborate and shot something with it that is worth the effort. Let us know if you are interested.
@SianaGearz
@SianaGearz Күн бұрын
Apparently, optically clear silicone elasthomer is a thing.
@GarrettCrosgrove
@GarrettCrosgrove Күн бұрын
crazy that our eyes even work with the whole science of optics
@ValuedTeamMember
@ValuedTeamMember Күн бұрын
You *R* the "Applied Science Whisperer" ✌(◕‿-)✌ I haven't been this intrigued since I found out my hot sister was adopted. Just saying ¯\_(ツ)_/¯ Cheers from So.Ca.USA 3rd house on the left.
@lionfire01
@lionfire01 Күн бұрын
I only just found this channel and i am so glad i did. Have you used a parabolic lens and the rear projection screen lens together? apparently you can melt rock as the projection lens focuses the light to the center in a similar way to what you showed here.
@shiqixu2902
@shiqixu2902 Күн бұрын
I've a feeling at some point you are just going to reinvent those giant lithography lens
@joeserdynski1045
@joeserdynski1045 Күн бұрын
Thanks ! ! !
@francoisgervais1
@francoisgervais1 2 күн бұрын
I’m here for the custom use of a cordless tool battery. I feel you showed me the way out of the box 🤩
@197312
@197312 2 күн бұрын
only way to attract others by being true, honest and genuinely share doing something you love with a little hustle, 🙏 thanks for sharing
@ShyStudios
@ShyStudios 2 күн бұрын
I would love to know what the T-Stop of that lens is. It would be a cool project to develop a DIY way to accurately measure the amount of transmission loss through a lens into a standardized T value. Right now one of the only sources for T-Stop measurements is dxo mark and they obviously do not have data for every lens ever made.
@user-lp2op9uu1w
@user-lp2op9uu1w 2 күн бұрын
Super cool stuff and video! Fresnel lenses are such a clever hack
@rustyosgood5667
@rustyosgood5667 2 күн бұрын
I friend of mine used to hang a glass rod in his drill press and then heat it with a torch while drawing it (suspended weight?) to form lenses. He made a 5x lens this way...sort of a fiber optic 5x lens. I wonder what the upper limit would be for this technique...practically speaking.
@memejeff
@memejeff 2 күн бұрын
Incredibly cool. Would love to see more.
@mesomachines
@mesomachines 2 күн бұрын
Cargill used to make a set of immersion oils with varied index of refraction. They were handy to make optical corrections in systems like this, but were unfortunately pretty toxic.
@conrthomas
@conrthomas 2 күн бұрын
My red digikey ruler will never leave my side, it is my most used tool and I see that I'm not alone
@amandahugankiss4110
@amandahugankiss4110 2 күн бұрын
i could kiss you.