Three dimensional FMCW flash imaging: large field-of-view challenges
Room 306 (Level 3 South)
Mobile mass-market applications have been slowly but surely introducing 3D sensing in their devices. After gesture motion detection in video games, facial recognition is nowadays common on most of smartphones. We study here the heterodyne detection yield of a large field-of-view FMCW imaging system with a flash infrared illumination of the scene and using commercial micro-optical modules and sensor. We investigate several optical system LO configurations with regard to heterodyne yield angle dependency and photometric performance. Finally, the experimental and simulation results help us optimize our large field-of-view 3D imaging prototype built for the visible near-infrared region range.
Laurent Frey received the Ph.D. degree in optics from the Institut d’Optique, Université Paris Sud, Orsay, France, in 2000. He was a Research Scientist with the Optical Telecommunications Division of Corning, Fontainebleau, France. He then joined CEA-LETI, Grenoble, France, in 2003, where he was first involved in the fields of silicon photonics, superconducting single photon detectors, and holographic data storage. In 2008, he was been in charge of the roadmap optical systems for image sensors and modules, and led technological developments for the integration of optical functions on visible and infrared image sensors for industrial partners. Since 2019, he has been leading 3D sensing innovative projects at the system level.