The Opportunity

Light, in fact, travels deep inside the body. You can try this experiment with your smartphone flash – a huge amount of light can traverse deep into the body. And it is both non-ionizing (400-1100 nm), and inexpensive to produce, control and sense.


Scattering poses a huge barrier

Most pass-through photons are scattered, with an average of 10 scattering events per mm. By 50mm, a photon could face an average of 500 scattering events! If we wanted to use light for imaging, we have a large-scale inverse problem with low SNR.

See below the skin

Expeditions is developing a whole new class of imaging techniques to invert the scattering phenomena. Labeled Computational Photo-scatterography, the new methods combine sensing, analog and algorithmic innovations for a new generation of computational bio-imaging. 


High-res DOT wins Best Paper Honorable Mention at ICCP 2020

High Resolution DOTDiffuse Optical Tomography Diffuse optical tomography (DOT) is an approach to recover subsurface structures beneath the skin by measuring light propagation beneath the surface. The method is based on optimizing the difference between the images collected and a forward model that...

HealthSense wins Best Community Paper Award at ACM MobiCom

Health Sense Managing Clinical Trials With the rise of ever-more sophisticated wearables and sensing technologies, mobile health continues to be an active area of research. However, from a clinical researcher's point of view, testing novel use of mobile health innovations remains a major hurdle,...

PhaseCam3D wins ICCP 2019 Best Poster Award

PhaseCam3D Passive Single-View Depth Sensing 3DImaging is critical for a myriad of applications such as autonomous driving, robotics, virtual reality, and surveillance. The current state of art relies on active illumination based techniques such as LIDAR, radar, structured illumination or...

WISH: wavefront imaging sensor with high resolution

WISH Wavefront Sensing Wavefront sensing is the simultaneous measurement of the amplitude and phase of an incoming optical field. Traditional wavefront sensors such as Shack-Hartmann wavefront sensor (SHWFS) suffer from a fundamental tradeoff between spatial resolution and phase estimation and...

Fermat Non-line-of-sight scanning wins CVPR 2019 Best Paper!

Fermat Non-line-of-sight scanningA Novel Theory of Fermat Paths We present a novel theory of Fermat paths of light between a known visible scene and an unknown object not in the line of sight of a transient camera. These light paths either obey specular reflection or are reflected by the object’s...

Ellipsoidal Path Connections for Time-Gated Rendering

Time-of-flight SimulatorTime-Gated Rendering During the last decade, we have been witnessing the continued development of new time-of-flight imaging devices, and their increased use in numerous and varied applications. However, physics-based rendering techniques that can accurately simulate these...

Ultrasonically sculpted virtual relay lens for in situ microimaging

Virtual Micro-endoscopyWhy virtual micro-endoscopy? Light-based methods are widely used for functional and structural medical imaging, as well as therapeutic interventions. However, scattering of light in biological tissue limits the application of such methods to only superficial layers. While...

Join the Expeditions Team

We are looking for undergraduate, graduate and post-doctoral associates to join the team. We are a diverse team and welcome all students. Please contact the team members to learn more.