Measurement of true temperature fields by near-infrared thermoreflectometry
type: Dataset
contact point: Organization
  fn: CCSD
keyword: infoinfo-tscomputer-science-cssignal-and-image-processing
keyword: theses
keyword: radiative-properties-of-opaque-materials
keyword: infrared-thermography
keyword: infoeu-reposemanticsdoctoralthesis
keyword: proprietes-radiatives-des-corps-opaques
keyword: emissivite
keyword: emissivity
keyword: spioptiengineering-sciences-physicsoptics--photonic
keyword: spisignalengineering-sciences-physicssignal-and-image-processing
keyword: physphysphys-ins-detphysics-physicsphysics-physicsinstrumentation-and-detectors-physicsi
keyword: thermographie-infrarouge
keyword: reflectometrie-laser
keyword: laser-reflectometry
keyword: camera
keyword: instrumentation
landing page: https://theses.hal.science/tel-00797425
description: True temperature field measurement is a key parameter for the optimization and the control of industrial processes. Current systems present limitations, especially on heterogeneous surfaces and/or in dynamical conditions involving the surface's variation. These restrictions are due to the ignorance of the surface's emissivity, which is a complex function of many physical quantities (temperature, wavelength, roughness, direction of detection). This thesis presents the complete development of a new method of true temperature field measurement, called Thermoreflectometry, applicable on any kind of opaque material, in the range [300-1000]°C. It allows the on-line measurement of emissivity by mixing a step of classical THERMOGRAPHY with a step of laser REFLECTOMETRY. The approach of this work is, first, the critical analysis of the method and its influence quantities, and then the optimal dimensionment of the components by simulation studies. Thirdly, a prototype is built and its defaults are characterized, following a CAMERA-based point of view, and the possible corrections are implemented. Finally, the experimental performances are estimated on some complex heterogeneous thermal scenes which emphasize the prototype's precision for all the tested samples.
issued: 2026-05-13T12:39:55.425466
language: fr
modified: 2026-05-13T12:39:55.425471

test_moissonnage_selune
type: Agent

Measurement of true temperature fields by near-infrared thermoreflectometry
type: Distribution
access URL: https://theses.hal.science/tel-00797425
format: HTML
issued: 2026-05-13T12:39:55.512702
modified: 2026-05-13T12:39:55.371532