New tutorial on `ZoomFFT` for speeding up off-axis computation in Python:
#optics#Python#digitalholography@InstLangevin
WARNING: New posts will only be on BlueSky from now on.
https://t.co/AY9kpfLTbc
1/ We all know that if I can see your eyes, you can see mine. This is thanks to the optical *reciprocity principle*, which states that light paths are reversible. But what if there’s a scattering medium between us, like fog? Can reciprocity still help us “see”? 👁️👁️#Physics
Check out our new @NaturePhotonics paper on the generation of cluster states at record-high rates using high-dimensional entanglement:
https://t.co/af7POYsi9v
We use spatial entanglement to reduce the number of photons and feed-forward steps in photonic quantum computation (a 🧵)
In an ideal optical fiber, rotating the input cleanly rotates the output. That’s not the case in real fibers. Characterization of this effect leads to new practical applications.
Read https://t.co/IyncccwGXn
@WFShaping@BrombergYaron@GuyPelc@Adv_Imaging_Lab#PRXOptics
So what?
In the rest of the paper we develop two potential applications:
1. From the RME measurement, we can estimate the level and geometry of the disorder. Interesting for manufacturing, quality control, and modeling applications!
Bravo Alexandre Aubry et son équipe de l'@InstLangevin@ESPCI_Paris : passer sur @franceculture pour présenter ses recherches c'est le graal !
https://t.co/xJbksP1ipm
New preprint: we show wavefront shaping with a new kind of MEMS megapixel spatial light modulator that has fast pistoning micro-mirrors: https://t.co/uChEkDHyoT (includes code to run it fast). Great effort from project lead José @carl00s01, also with @gsdgordon@joelacarpenter.
Our new tutorial on digital micromirror devices (DMDs) for #wavefrontshaping is also available on my website, with added animations and Python code:
https://t.co/El24yEEMDx
Thanks again Rodrigo Gutierrez Cuevas, @BrombergYaron, and M.W. Matthès.
@InstLangevin@ESPCI_Paris
4. Thermal Stability
DMD response changes with temperature, and they heat up over time…
You can either engineer a cooling system or wait for it to stabilize after a few hours.
3. Mechanical stability
DMDs are typically connected to a PCB with a rigid cable, transmitting vibrations from the fan.
A simple fix: isolate the cable with foam—boring but effective!