Albert Redo-Sanchez, PhD

Professor, Universidad de Zaragoza · Graphics and Imaging Lab

Computational imaging: seeing around corners, through objects and beyond the visible.

Albert Redo-Sanchez is a Professor at the Universidad de Zaragoza and a member of the Graphics and Imaging Lab, where he works on non-line-of-sight and transient imaging: reconstructing scenes that are hidden from direct view. His career spans academia and industry, from research at the MIT Media Lab, Rensselaer Polytechnic Institute and the University of Barcelona to leading terahertz technology at das-Nano, business development at Zomega Terahertz Corporation and optical design at Brelyon. He has authored 21 journal papers and is an inventor on 18 patents.

Recent highlights

2026Transient polarimetry, poster at SIGGRAPH 2026.
2025Artifact-resilient real-time holography published in ACM Transactions on Graphics.
2024Time-gated polarization for active non-line-of-sight imaging presented at SIGGRAPH Asia 2024, Tokyo.
2024Invited talk on the Dirac-notation framework for NLOS imaging at Optics, Photonics and Lasers, Valencia.

Projects

Diagram of non-line-of-sight imaging, with light bouncing off a relay wall to reach a hidden object

Universidad de Zaragoza · NLOS imaging

Seeing around corners

Reconstructing scenes hidden from view using light that bounces off a visible wall.

Optics Letters 2022 Optics Express 2024 SIGGRAPH Asia 2024 Dataset

Hands holding a stack of paper pages, each marked with a letter

MIT Media Lab · Nature Communications 2016

Reading a closed book

Reading letters on the pages of a closed stack of paper with terahertz time-gated spectral imaging.

Paper TEDx talk Slides & video

Goya's painting The Sacrifice to Vesta shown next to its X-ray and terahertz images

University of Barcelona · Optics Express 2013

Terahertz look at Goya

Revealing hidden features of Goya's "The Sacrifice to Vesta" (1771) with terahertz waves.

Paper Slides

Terahertz scanner prototype projecting a red scan line onto a test target

Rensselaer Polytechnic Institute

High-speed terahertz scanner

An ellipsoidal-mirror terahertz scanner imaging large areas at up to 250 frames per second.

Slides & videos

Sample of Space Shuttle external-tank insulation foam

Rensselaer Polytechnic Institute

Space Shuttle foam inspection

A portable terahertz system for non-destructive inspection of Space Shuttle insulation foam.

Slides

das-Nano

Terahertz systems for industry

Commercial terahertz instruments for 2D materials, composites and automotive paint.

Onyx Notus Irys

More about each project →

Selected publications

Nature Communications2016
Terahertz time-gated spectral imaging for content extraction through layered structures
Redo-Sanchez, A., Heshmat, B., Aghasi, A., Naqvi, S., Zhang, M., Romberg, J., & Raskar, R.
ACM Transactions on Graphics2025
Artifact-resilient real-time holography
Chu, V., Pueyo-Ciutad, O., Tseng, E., Schiffers, F., Kuo, G., Matsuda, N., Redo-Sanchez, A., Lanman, D., Cossairt, O., & Heide, F.
SIGGRAPH Asia2024
Time-Gated Polarization for Active Non-Line-Of-Sight Imaging
Pueyo-Ciutad, O., Marco, J., Schertzer, S., Christnacher, F., Laurenzis, M., Gutierrez, D., & Redo-Sanchez, A.
Optics Express2024
Cohesive framework for non-line-of-sight imaging based on Dirac notation
Redo-Sanchez, A., Luesia-Lahoz, P., Gutierrez, D., & Muñoz, A.
Optica2016
Sweep distortion removal from terahertz images via blind demodulation
Aghasi, A., Heshmat, B., Redo-Sanchez, A., Romberg, J., & Raskar, R.

All publications and patents →

Research areas

Non-line-of-sight (NLOS) imaging
Transient imaging
Computer vision and machine learning
Modeling and simulation
Terahertz technology
Non-destructive testing

Skillset

Code and data processing

Python, C/C++, Matlab, Mathematica, LabView

Design

Zemax, SolidWorks, Fusion360, VRED

Research

Experiment design, execution, data modeling, analysis and reporting; proof-of-concept experiments and prototyping up to a minimum viable product (MVP)

Management

Project planning, execution and supervision; proposal writing and funding

Sales and business development

Customer requirements collection and analysis; relationships with distributors; commercial product development