Development of a fully passive plenoptic thermal imaging system

  • Photonics, Imaging and displays,
  • phD
  • CEA-Leti
  • Grenoble
  • Level 7
  • 2024-10-01

Low-resolution plenoptics is becoming widespread in visible imagers for applications such as autofocus, image post-processing and sometimes depth estimation. Its principle is based on the association of three main constitutive elements, a pixels-sized microlens array, a focal plane array of detectors and reconstruction algorithms. Through this thesis, we would like to evaluate the possibility of achieving such a plenoptic function in the infrared range for uncooled detector technologies (micro-bolometer) Within the Optics and PhoTonics Department (DOPT), the Thermal and THz Imaging Laboratory (LI2T) designs, develops, produces and characterizes thermal infrared imager technologies, which are then transferred to an industrial partner. As a doctoral student, your role will consist of: - Establish preliminary specifications for micro lenses adapted with our detectors and with the application of autofocusing. - Design and simulate the behavior of this micro-optics and propose original designs in refractive solution or in meta-surface - Manufacture these micro-optics after evaluating the feasibility of these designs in partnership with the people in charge of manufacturing - Implement an existing reconstruction algorithm that will be identified in the literature - Characterize the micro-optics on a dedicated bench To carry out these missions, you will be integrated into the LI2T laboratory where you will be able to interact with different people in order to familiarize yourself with micro bolometer technologies and where you will have access to the calculation resources of CEA Leti.


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