Noninvasive incoherent imaging through scattering media based on wavefront shaping

[T. Yeminy and O. Katz., arxiv, 2007.03956 (2020)]

Wavefront shaping unlocked many exciting applications related to imaging through scattering media. However, they usually require to have some feedback from the object to observe, typically a guide-star generated by physically labeling the sample or by using ultrasound (that reduced the resolution). Other computer-based approaches recently developed relied on the memory-effect, which drastically limits the field of view, or requires a coherent illumination. In the present paper, T. Yeminy and O. Katz present a very simple approach that allows the reconstruction of an object hidden behind a scattering medium under incoherent illumination. It uses wavefront shaping of the scattered light together with an optimization procedure based on some assumptions about the object.

Making useless (but beautiful) gifs with fiber modes

Social media like (too) short content like pictures or quotes, but above all, people love gifs (probably way too much). Publish a link to a few pages long post you wrote about a paper, a physical concept, or a piece of code, and a few people will like your tweet/post. Publish a gif, and the number of people you will reach will increase dramatically. Is it a good thing? Well, that depends on what you do with it. I try to use gifs to draw attention to more in-depth content that I hope some people will read. Let's make one together.

Endoscopy combining photoacoustic and fluorescence imaging with a small footprint

[S. Mezil et al., arxiv, 2006.10856 (2020)]

Achieving optical-resolution photoacoustic imaging can currently only be obtained using endoscopy. It usually implies a quite bulky endoscope and/or a low signal-to-noise detection. In this paper, the authors present a technique that combines wavefront shaping through a multimode fiber, to scan the focus spot, with a single-mode fiber-based ultrasound sensor to achieve a high signal-to-noise with a small footprint (250 by 125 microns).

Hey, we got a new website!

It was long overdue, but we now have a fully functional new website (written in Python!). The interface has been simplified and I added new cool features, like the possibility to run small Python apps directly from the site. See this new DMD tool app for instance, I plan to add more in the future as well as to add content more regularly, such as article highlights, talks, etc...

Please feel free to write comments or remarks, as I wrote the website myself, I am sure it is not bug-free...