Hi, my name is Jeroen and on the Huygens Optics channel I publish videos on personal projects. My main fields of interest are optics, mechanics and photolithography. The videos aren't targeted towards a general audience but for people with a passion for science and technology (e.g. my fellow nerds).
The channel is named after the famous Dutch mathematician, astronomer and inventor Christiaan Huygens (1629-1695). He was the first to publish a mathematical description of the wave properties of light, and also discovered Saturn's rings.
I make these videos for fun, without a financial motivation. However, you can support the production of future videos. Please don't contact me for sponsoring contracts or in-video advertisement. Neither me nor my viewers are interested. If you want to contribute, do so by either donating using the Paypal link or by contacting me directly. Because of several requests, I also decided to make a Patreon account: www.patreon.com/huygens_optics
Gravity refraction would be better illustrated with a black hole. Earth’s atmosphere refracts light illuminated by a sunset. In similar manner, space dust could refract light.
So what are we looking at/for? It seems to me there is a very slight vally on the left 1/3 as it darkens. Im getting ready to start grinding my first 8 inch mirror in 2024 and hopefully i can find SOMEONE selling a 16 blank soon as theyve all just sold the last one not long ago but they have sane prices on blanks ($200-300 dollars vs $2000+ on ebay) and im looking how to use foucalt testers.
Try Stathis Firstlight, he sells blanks for reasonable prices. About Foucault: skip it and go straight to a Bath interferometer with DFTfringe. It gives you way more accurate measurement results.
The video is a treasure of information, but 27:47 "Important optical experiments always prevail over a bit of privacy" is inherently incorrect, respectless and needlessly introduces moral ambiguity in the scientific method.
It makes a lot of sense to me to start with a thin card rather than the double slit. It still exhibits some results and is simpler. That was my first experiment as well. I was using a laser to play with the cat. I found a whisker and pointed the light at it and saw the pattern. I was surprised to see it without the double slit at first.
What is so weird is that even if ths point has zero light in it, it alows energy to go through and light can still be measurable at this point. or am I wrong? would it pass through matter here? why would it?
Wait, isn’t destructive and constructive interference happening at the same time? Like moire patterns, ya there are dark spots but the white spots are brighter too.
I always thought that diffraction is simply funky bounce abouts of light on the edges of grates. I wonder if a collimating below wavelength sharp cut would look very different than this demonstration
This is so amazing. A weird question: if one takes any sample of white light out of focus with such a interferometer there would still be a interference pattern visible no? It would just give a flat surface picture though. Now if there are refractive index differences due to thermal effects or the like in this space in the air one should also see strong interference pattern height jumps, am I very wrong?
It depends, with the Mirau objectives you can generally change focus and interference distance separately. But you need these to match in order to create a high -resolution map. In other words, the interference and focus distance need to match exactly for the best results.
@@HuygensOptics Thank you for the answer: It made me realise my very wrong wording as newly interested viewer: Instead of “Out of focus” I meant “not focusing on a surface but a point in air”. Sorry for that. The precision of the Mirau objective just made me wonder if smaller refractive index changes in air (thermal, (sound?) pressure, different gases, concentrations, etc) would also be measurable? Scanning and pattern recording speed might be problems to tackle here. I am just recently pondering about chaotic optics in everyday life which an AI could never simulate so don’t mind me too much. PS: is a dirty water surface measurable with the Mirau objective? Is the surface between oil and water measurable? Is the curvature of a drop that doesn’t wet the surface measurable? I think it’s called the “contact angle” that measures a surfaces hydro/oleo-phobicity. I read about multi focal fresnel lenses for retina scans today due to your video & don’t really get yet how they can be made so precise and multi focal. As if a Mirau Multi focal fresnel lense interferometer would be possible.. you see I am clearly having fantasies due to the late hour here. It could never be the Mirau Design, the double & reference mirror would need to deal with multi focal mechanics..
@@lucelxebinog well, your suggestion is actually quite interesting. I will try looking at surfaces of liquids. If anything interesting comes out, I'll make a short about it.
Hey there dude! I gotta say I really like your channel, especially how you embrace fun into science and your family Disco Dance Club and all..!! HA HA! What, where am I? Is this the right channel??? Anyway, as we're talking about high fidelity Disco sound...what challenges would you overcome in the possibilities of doing vacuum vapor deposition of titanium onto a lightweight mylar plastic headphone diaphragm? Specifically, a Koss brand, Porta Pro model pair of headphones. In my mind's eye I see the titanium layer stiffening the lightweight mylar from flexing, further increasing the already astonishingly accurate low distortion sound of these headphones. Anyway, those Koss Porta Pros or their KPH30iCLs IMO would be the way to go on this vapor deposition experiment, if nothing else very challenging to deposit on the clear plastic headphone diaphragm surface without melting it in the vacuum chamber. My Idea is that adding the stiffness of titanium to the head phone's voicecone-diaphram would give further lightweight stiffness to the transducer headphone element, further dropping membrane flex induced distortion, and further increasing jaw dropping sound reproduction accuracy, like further putting you into the recording studio, to hear fingertips sliding along wire wrapped guitar strings, and all the other hidden sound recording session details.... Whew, I somehow spit that all out. So ok there Mr. DJ, make me a pair of the best, stiffest, ultra light, Titanium tweaked Koss headphones on this planet!
Generally, the PVD layers are much thinner than 1 micron, so stiffness would not increase a lot. If you want to improve this property, you need to deposit an adhesion layer like Ti and do electro-plating. Especially if you do this on both sides, the membrane stiffness will definitely improve.
@@HuygensOptics You didn't mention that in the video, so I was afraid, that you can be unaware of such possibility. Reflex lenses are insanely good in general, I just bought Tokina 300mm F6.3 for my M43 camera, thanks to this video. And I'm insanely glad that I bought it =)
Absolutely fantastic video. It would be very interesting to map a large section of space, the great attractor, and farther things, so show how it all looks across a whole gravitationally bound area, AND those that are not bound, so how expansion v gravitational lensing work. (expansion not causing relativistic effects) I've watched it 4 times to really try to understand the whole idea - but first, the very idea of saying gravitational index, so succinctly, is brilliant. Scripting is brilliant, right as I am saying "ah but what about..." - you're right there answering the questions and leading us on in thinking. I've often argued on physics forums that we're already within the limits of visible relativistic effects - relative to the great attractor we're traveling at 600 km/s - which would be detectable real-world (world?) motion, with relativistic effects. Event the smallest motion is relativistic (there is no threshold, but i've heard 4% bandied around as detectable, but 0.002 could be on sensitive stuff) anyway, that's the late night grasp I have on this, amazing stuff and love the direction, BEST CHANNEL ON RU-vid!
You are correct, there really isn't any threshold, effects just get very small, often too small to measure (even with atomic clocks). Thanks for your comment, I think you will like the upcoming video too, since it will be on a related subject.
The mirrors do not sit flat when the DMD is running. They can only be +/- 12 degrees (angle differs btwn models). This is because there are mechanical stops tightly controlling the angle when the mirrors are being electrostatically driven. The position of the mirrors is not perfectly flat when 'floating', and so it is not a state used for display.
I am trying to ultimately build a segment display which is completely transparent. I know that it is really, really hard, but I just want to find out if I can do it. I just need a plan for a transparent isolator.
best bathroom work is with a cup of coffee after 4 days of none. gets the ideas flowing and much more. I like that you brought up veratasium bouncing bubbles. they inspired some night thinking for me too. As for interference, I think any slit results in a specific location for any frequency to show up at, based on the physical dimensions of the pulse (photon) as it passes through the slit. no duality BS needed. we can see it all there as wave interaction based on physical constraints, and YES, a wave does have momentum; what else would you call a pulse?
!! Let's look at a naked universe without noise pollution. Where is the scientific interest and curiosity for new experiences? ERROR in measuring the Universe, black holes, dark energy,... Let me judge all this by the result of a direct experiment, gentlemen of physics Let's do the Michelson-Morley experiment on a school bus and determine the speed in a straight line - this is exactly the experiment Einstein dreamed of. Perhaps we will see the postulates: “Light is an ordered vibration of gravitational quanta, and Dominant gravitational fields control the speed of light in a vacuum.” There is a proposal for the joint invention of a HYBRID gyroscope from non-circular, TWO coils with a new type of optical fiber with a “hollow core”, where - the light in each arm passes along 16,000 meters, without exceeding the parameters of 40/40/40 cm and mass - 4,1 kg. Привет с Казахстана. Просьба. Помощь найти, кто захочет стать автором изобретения и ради этого вложить средства. В Китае на предприятии по выпуску Волоконно-оптических гироскопов, возможно договориться. Производить устройство ГИБРИД гироскопы. Эти устройства будут использоваться в качестве учебного пособия в школах, высших учебных заведениях. Также возможно будет с помощью *ГИБРИД гироскопа* сделать научные открытия; в астрономии, астрофизики, космологии, высшей теоретической физики, …
Since spacetime is not flat but hyperbolic, you can have "more spacetime" in an enclosed region than the boundary would imply. So it isn't too far off to say that the rays going through the middle of the schematic take longer because there is more spacetime to go through.
Hey Huygen, do you know Garret Moddel? He had construct e cell that can harvest background Radiation. With this Vapor deposition chamber that you have built you could replicate his findings on his papers that he released. Since you have plenty of knowledge of radiation and Optics and Access to a Vapor Deposition Chamber you could check his work out on his RU-vid channel Garret Moddel. I'm eager to hear your thoughts.
This is one of the best videos on RU-vid on the subject, I’ve reference people to this video all the time. An incredible number of people have the misunderstanding that the EM field is quantized. The photon did not go through one slot or the other, the wavefront went through both. then it is just the probability of detection there’s no magic science about this.
In water one point make circle, the wave is one iluzion of this circular move. Ligth make some similiar but the dual property of ligth hide some probable. My noob opinion.
great explanation, I have an Aluminum mirror coating machine can I get a simple diagram on how it really work, it has Rotarypomp, Booster pump, Elctric high voltage unit, Chamber, Diffution pump, and the panel boar we frequently use words are Backing, roughing, Highvacume.. but I cannot logically understand how it functioning
Can it be used for a telescope? I mean large telescopes for frontline astrophysics/cosmology studies. This technology certainly removes the problem that large refracting telescopes have, i.e. their weight, that's why virtually all large telescopes use mirrors instead of lenses.
