Tootfinder

Multiplexed back focal plane imaging with on-chip integrated microlens array
Magdalena Furman, Marcin Muszy\'nski, Przemys{\l}aw Oliwa, {\L}ukasz Zinkiewicz, Aleksander Bogucki, Jacek Szczytko, Piotr Wasylczyk, Wojciech Pacuski, Mateusz Kr\'ol, Barbara Pi\k{e}tka
https://arxiv.org/abs/2510.09348

Multiplexed back focal plane imaging with on-chip integrated microlens array
On-chip optical architectures that enable angle-resolved spectroscopy are essential for advancing photonic platforms towards low-volume, scalable, and cryo-compatible devices. Here, we introduce spatially resolved momentum-space imaging using arrays of 3D-printed microlenses directly integrated onto semiconductor optical microcavities. Each microlens functions as an independent optical element with a high numerical aperture (approx. 0.95), enabling parallel back focal plane imaging across, in o…

Microlensing of non-singular black holes at finite size: a ray tracing approach
Jens Boos, Hao Hu
https://arxiv.org/abs/2510.10282 https://arxiv.org/pdf/25…

Microlensing of non-singular black holes at finite size: a ray tracing approach
We study the gravitational microlensing of various static and spherically symmetric non-singular black holes (and horizonless, non-singular compact objects of similar size). For pointlike sources we extend the parametrized post-Newtonian lensing framework to fourth order, whereas for extended sources we develop a ray tracing approach via a simple radiative transfer model. Modelling non-relativistic proper motion of the lens in front of a background star we record the apparent brightness as a fu…

Trump is selling a strong economy. Voters aren't buying it. (Megan Messerly/Politico)
https://www.politico.com/news/2025/09/13/trump-is-selling-a-strong-economy-voters-arent-buying-it-00561986
http://www.memeorandum.com/250913/p26#a250913p26

Detection of colour variations from gravitational microlensing observations in the quadruple quasar HE0435-1223: Implications for the accretion disk
Christian Sorgenfrei, Robert W. Schmidt, Joachim Wambsganss
https://arxiv.org/abs/2509.09341

Detection of colour variations from gravitational microlensing observations in the quadruple quasar HE0435-1223: Implications for the accretion disk
We present monitoring observations of quasar microlensing in the quadruple quasar HE0435-1223. The microlensing-induced light curves of the quasar images are chromatic, i.e. they depend on the applied filter band. Comparison with microlensing simulations allows us to infer properties of the accretion disk. We determine the R and V band light curves of the four images of HE0435-1223 from 79 and 80 epochs respectively, taken from 2014 to 2024 at the Las Cumbres Observatory using difference imagin…

Erst war es nur ein Loch. Dann wurde es ernst ...
#TurtleStitch

Flicken Sticken
Problem My dachshunds chewed a hole in my jacket pocket. Not just an ordinary jacket, but a kind of Janker, a type of Bavarian traditional jacket, most...

Fenix 8 Pro: Garmin stellt Smartwatch mit MicroLED-Display vor
Garmin hat Pro-Modelle seiner Fenix 8-Serie vorgestellt, die die Preise der Sportuhren dank leuchtstarkem MicroLED-Display an die 2000-Euro-Grenze drücken. 

Detecting dark matter substructure with lensed quasars in optical bands
Jianxiang Liu, Kai Liao, Yan Gong
https://arxiv.org/abs/2510.09148 https://arxiv.or…

Detecting dark matter substructure with lensed quasars in optical bands
Flux ratios of multiple images in strong gravitational lensing systems provide a powerful probe of dark matter substructure. Optical flux ratios of lensed quasars are typically affected by stellar microlensing, and thus studies of dark matter substructure often rely on emission regions that are sufficiently extended to avoid microlensing effects. To expand the accessible wavelength range for studying dark matter substructure through flux ratios and to reduce reliance on specific instruments, we…

Calibrated Dynamic Modeling for Force and Payload Estimation in Hydraulic Machinery
Lennart Werner, Pol Eyschen, Sean Costello, Pierluigi Micarelli, Marco Hutter
https://arxiv.org/abs/2510.11574

Calibrated Dynamic Modeling for Force and Payload Estimation in Hydraulic Machinery
Accurate real-time estimation of end effector interaction forces in hydraulic excavators is a key enabler for advanced automation in heavy machinery. Accurate knowledge of these forces allows improved, precise grading and digging maneuvers. To address these challenges, we introduce a high-accuracy, retrofittable 2D force- and payload estimation algorithm that does not impose additional requirements on the operator regarding trajectory, acceleration or the use of the slew joint. The approach is …

Microlocal analysis of the non-relativistic limit of the Klein--Gordon equation: Estimates
Andrew Hassell, Qiuye Jia, Ethan Sussman, Andras Vasy
https://arxiv.org/abs/2509.09518

Microlocal analysis of the non-relativistic limit of the Klein--Gordon equation: Estimates
This is the more technical half of a two-part work in which we introduce a robust microlocal framework for analyzing the non-relativistic limit of relativistic wave equations with time-dependent coefficients, focusing on the Klein--Gordon equation. Two asymptotic regimes in phase space are relevant to the non-relativistic limit: one corresponding to what physicists call ``natural'' units, in which the PDE is approximable by the free Klein--Gordon equation, and a low-frequency regime in which th…