At Conference on Lasers and Electro-Optics CLEO/Europe 2025. My first tome at this exciting conference was in 2005! 20y ago! Back then it was also a poster, but this time O am presenting in a bit distinct topic too!
#physics #optics #cleoeurope #photonics #academicchatter
#optics
EU Project ELENA Pioneers LNOI Platform for Next-Gen Photonic Circuits & Europe’s 1st Commercial Supplier of LNOI Wafers
Date Announced: 23 Jun 2025 Capacity to Deliver Millions of TFLN Chips Annually ‘Firmly Positions…
#Europe #EU #Aerospace #analysis #B2B #buyersguide #cleantechnologies #Cleantech #défense #Events #Imaging #industrial #jobs #laser #LifeScience #materialsprocessing #medicine #News #Optics #optics.org #Photonics #pressreleases #products #spie
https://www.europesays.com/2189126/
blender 5 renderer preview https://www.youtube.com/watch?v=o-dZKBwbsis
jk, it's a spinning microscope.. which is even cooler
Estuve haciendo algunas pruebas con una cámara planetaria Celestron NexImage5 y los resultados son muy buenos. La cámara me dá una escala de placa de 0.38"/px lo cual es una warangada dado que el poder de resolucion del telescopio es 1.45". Las imagenes son stacks con Registax de 300 cuadros en el caso del Sol y 120 cuadros para Venus. Recien son las primeras pruebas, pero con el tiempo iré mejorando y llevando la óptica al límite. Hasta ahora, una maravilla. #telescopio #refractor #kasai #oldscool #astronomy #astronomía #óptica #optics #japan
Forget about #optics, optics have been decided already. This isn't the world you wish it was.
#Politics #Democrats #Republicans #Liberals #Conservatives #Vote #Election #DemocraticParty #DNC #RepublicanParty #RNC #GOP #DonaldTrump #Trump #JDVance #Vance #JoeBiden #Biden #KamalaHarris #Harris #TimWalz #Walz #Democracy #US #USA #ElonMusk #Musk #Fascism #Fascist #BernieSanders #Sanders #AOC #FraudSquad #Progressive #Progressives
🎉New paper! https://doi.org/10.1364/OE.559280 📝
We look at how different numbers of capillaries affect the guidance properties of hollow core fibres, enabling the guidance of ~ 50 modes in the near-infrared. Some cool fibres in here that guide the visible and ultraviolet #science #optics #photonics
The #soldiers roared w/laughter & applauded #Trump's diatribe in a shocking & rare public display of #troops taking part in naked political partisanship.
For this story, Military.com reached out to #Defense Secy #PeteHegseth's office as well as the #Army & the 82nd Airborne Division directly w/…questions that ranged from #optics …to…the sale of Trump #campaign #merchandise on the base, to the apparent violation of #Pentagon policies on #political activity in uniform.
This is sickening
#Trump's Military Audience While in Uniform Were Checked for Allegiance
“Internal 82nd Airborne Division communications reviewed by Military.com reveal a tightly orchestrated effort to #curate the #optics of Trump's recent visit, including HANDPICKING SOLDIERS for the audience based on #political leanings & physical appearance.
One unit-level message bluntly saying: "No fat soldiers."
#propaganda #disrespect #DearLeader #authoritarianism
https://www.military.com/daily-news/2025/06/11/bragg-soldiers-who-cheered-trumps-political-attacks-while-uniform-were-checked-allegiance-appearance.html
A rainbow around the full moon? I think it's called an ice bow or halo.
Actually, I see at least three features around last night's full moon: (1st photo)
1. (part of) a circular halo around the moon...which is colored red on the inside, blue on the outside
2. a moondog to the left of the moon, also on the circular halo
3. part of a colored halo (top center of frame) that appears to encircle the zenith. This is quite faint.
Don't get distracted by the internal camera lens reflections that are a bit above and right of center.
I processed the same photo in a different way to make stars more visible. The full moon is in the heart of Scorpio. The right portion of the frame contains Corvus the crow, and above that is Virgo.
This image of the moon, sky, stars...in a loose sense...is data. As I process the data differently, I can make different features easier to see.
#Moon #Halo #Rainbow #Stars #Photography #Data #ImageProcessing #DataProcessing #Optics #Algorithm #Lens #Corvids
Bueno, estuve haciendo algunos star test en el telescopio nuevo y para mi sorpresa, se trata de un excelente lente, prácticamente sin aberraciones o por lo menos del orden de lambda/10 P-V lo cual significa que el prácticamente perfecto. El star test consiste en tomar una estrella brillante y tomar imagenes enfocada y desenfocada unas 4 ondas (que en mi caso son unos 3.9mm lo que hice con algo de incertidumbre) intra y extra focal y examinar el patrón de difracción de anillos. Las imágenes deberían ser en una óptica ideal, exactamente iguales. Nunca es el caso con ópticas reales y hasta los objetivos más caros suelen no pasar la prueba 100%. La intensidad de los anillos concéntricos revela una suavidad muy grande de la superficie o smoothness. Además de la ausencia de astigmatismo, coma y practicamente de aberración esférica. La aberración esférica es el terror de los telescopios refractores acromáticos y también apocromáticos, debido a que de las aberraciones primarias, es la única que es proporcional al inverso de la distancia focal al cubo, por lo que objetivos de corta distancia focal suelen no controlarla muy bien. En mi star test se observa algo de aberración esférica subcorregida muy mínima, del orden de lambda/10 común en las ópticas premium. La MTF del lente es prácticamente la teórica y el strehl ratio es del orden de 0.97 - 0.98 lo cual es inmejorable para un objetivo acromático Fraunhofer clásico, incluso comparable a un apocromático. El programa WinRoddier francés, estima un error P-V de lambda/12 y un error RMS de lambda/82 lo cual me parece un poco mucho, pero ta. Eventualmente voy a repetir el star test en mejores condiciones y con los desenfoques precisamente simétricos. Le envié el test que hice al fabricante del telescopio para manifestarle que es excelente el diseño y que cumplió con lo que el dice en la página, y me contestó invitandome a poner el test en su página, lo cual para mi sería un honor. Que pena que no se pueda vivir de esto. Como mensaje final para los fanáticos de los apocromáticos (y como de cada cosa que hago, elijo emprender una causa, en este caso, por los acromáticos largos oldschool), sepan que un acromático de estos le pisa los talones si no anda mejor en lo referente a resolución, ya que al controlar tan bien la aberración esférica originada en las 4 superficies esféricas del duplete, posiblemente resulte menor que en los objetivos apocromáticos que tienen 6 superficies esféricas con las que lidiar. Además, la tolerancia a los errores superficiales en el caso de los apocromáticos, es unas 10 veces menor que en un duplete, por lo que los apos, tienen que estar muy pero muy bien figurados para no contaminar la imagen con el clásico halo de luz parásita proveniente de la esférica a grandes magnificaciones, lo que de paso explica, porqué los acromáticos son invencibles en resolver estrellas dobles. Tengo una máquina de resolver dobles, efectivamente. Síganme para más tips sobre testeo de lentes y espejos de telescopios. #fraunhofer #doublet #telescope #telescopio #acromatico #achromat #kasai #japan #optica #optics #fisica #physics #diffraction #difraccion
Refraction with Snell's Law getting the love it deserves today.
@Lazarou Either way that whole "#FreedomFlotillia" shitshow is just absurd.
TLDR: Someone decided to do "#SomeRandomShit!" and I #rant about that:
None of these attempts ever succeeded for very obvious reasons.
The amount of aid they had was negligible.
None of them thought beyond entering the restricted waters.
If they wanted to just get arrested for trespassing a military area, the could've just flown to Israel and trespassed on any army or navy installation. Would've gotten them the same effect for much cheaper.
If they wanted to launch aid, they could've just mortar'd it across the border from Egypt: Would've more likely gotten something over there rather than none.
I don't deny the situation in #Gaza - far from it, but if anyone things they can just sail in there and not expect to get boarded, then they are criminally stupid.
- That's even less likely to succeed than trying to free GITMO inmates, cuz there is at least a right-of-passage waterway going through Guantanamo Bay...
They would've succeeded with a #Narcosub, but that would've failed the "#optics" and those are "Doing some Random Shit to pretend being noble!"
- Seriously, this is as stupid as paintballing cop cars and then complaining why one gets arrested.
Doesn't mean I think the sea blockade is absurd and inhumane, but given the fact #Hamas rules Gaza like a #NarcoState and literally ripped apart plastic drinking water pipes just to build rockets, it's obvious they are crafty.
- Most people, even in #Israel, are aware that #Netanyahu let #O7 happen to break the #IDF #Reservists #Strike against him. Neither #Mossad nor #ShinBet are that incompetent to not notice the amount of planning and logistics it took. But then again there's a very few links one needs to go from the #murderer of #Rabin to the #Kahanist faction that prop-up Netanyahu's coalition.
Obviously there's no incentive nor penalty existing to force a peaceful ending. And #Hamas are obviously making good profit rentseeking the population. That's why the leadership is propably chilling in a heated wirlpool in an air-conditioned apartment in Doha. The only reason those are breathing is because Netanyahu wants and needs them as "#ControlledOpposition"...
- We all know Hamas et. al. don't give a shit about the #Palestinians or #Palestine: They are #SuicideCult after all!
At least AFAICT this time the "FreedomFlotilla" aka. one dingy boat [ #Madleen ] with some weirdos on board had the wisdom to obey the orders when it was obvious the #ISC was about to board them to put on life jackets and sit on deck with their hands up.
- A previous "flotilla" from #Turkey resulted in at least one dead cuz someone had the stupid idea to resist and faced some marine in full tactical drip that pulled the trigger.
#Lasers now measured in #petawatts (one quadrillion watts) are now commonly used for high-energy research. Some researchers are planning #exawatt power systems. As lasers become ever more powerful, the demands placed on optical components grow in complexity and scale. The higher the power, the greater the laser damage threshold (#LDT) needed. To some extent new challenges can be mitigated by using large #optics. Learn more: https://ilphotonics.com/what-changes-when-manufacturing-and-using-large-vs-small-optics/
Revolutionary Omnar Bertele 50mm f/2 MC FLB Lens Recreates a Classic https://petapixel.com/2025/06/06/revolutionary-omnar-bertele-50mm-f-2-mc-flb-lens-recreates-a-classic/ #omnarbertele5cmf2 #opticaltechnology #omnarbertele #omnarlenses #mmountlens #Equipment #primelens #50mmf2 #optics #omnar #News #lens
This paper-thin lens can turn infrared light into visible beams—ushering in a new optical era of ultra-compact, light-bending devices. #Nanotech #Optics #Metasurface
https://geekoo.news/new-metalens-converts-infrared-light-into-visible-vision/
#PhysicsJournalClub
"Model-free estimation of the Cramér–Rao bound for deep learning microscopy in complex media"
by I. Starshynov et al.
Nat. Photon. (2025)
https://doi.org/10.1038/s41566-025-01657-6
As everybody who ever tried to orient themselves while immersed in thick fog knows, scattering scrambles information. The question "how much information is still there?" is not particularly interesting as the answer is "essentially all of it", as elastic scattering can't destroy information. A much more interesting question is "how much information can we retrieve?" In order to even try to give an answer we need to be a bit more specific, so the authors placed a small reflective surface behind a scattering layer and asked how much information about its transverse position could be retrieved. This is a well-posed question, and the answer takes the form of a "Cramér–Rao bound" (https://en.wikipedia.org/wiki/Cram%C3%A9r%E2%80%93Rao_bound).
After estimating this upper bound, the authors investigate how well a trained neural network can do at this task, and show that a specifically built convolutional neural network can almost reach the theoretical bound.
[Conflict of interest: Ilya Starshynov (the first author) did his PhD in my group.]
Much longer cleaning swabs for laser optics and head cleaning. Purchase yours 👉🏻
https://shop.sslasersolutions.co.uk/product/cleaning-swabs-l160xw6-8/
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