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This Open Access book discusses an extension to low-coherence interferometry by dispersion-encoding. The approach is theoretically designed and implemented for applications such as surface profilometry, polymeric cross-linking estimation and the determination of thin-film layer thicknesses. During a characterization, it was shown that an axial measurement range of 79.91 µm with an axial resolution of 0.1 nm is achievable. Simultaneously, profiles of up to 1.5 mm in length were obtained in a scan-free manner. This marked a significant improvement in relation to the state-of-the-art in terms of dynamic range. Also, the axial and lateral measurement range were decoupled partially while functional parameters such as surface roughness were estimated. The characterization of the degree of polymeric cross-linking was performed as a function of the refractive index. It was acquired in a spatially-resolved manner with a resolution of 3.36 x 10-5. This was achieved by the development of a novel mathematical analysis approach.

Optical physics --- Mensuration & systems of measurement --- surface metrology --- profilometry --- interferometry --- low-coherence interferometry --- semiconductor manufacturing --- optical metrology --- Open Access

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Information is key, which means that measurements are key. For this reason, this book provides unique insight into state-of-the-art research works regarding optical measurement systems. Optical systems are fast and precise, and the ongoing challenge is to enable optical principles for in-process measurements. Presented within this book is a selection of promising optical measurement approaches for real-world applications.

Technology: general issues --- History of engineering & technology --- speckle photography --- in-process measurement --- deep rolling process --- generalized phase shifting interferometry --- dual-aperture common-path interferometer --- real-time optical instrumentation --- optomechatronic systems --- electrical steel --- optical coherence tomography --- OCT --- scanning --- process monitoring --- laser material processing --- spot compensation --- low coherence interferometry --- LCI --- wind lidar --- Doppler lidar --- bistatic --- metrology --- traceability --- wind energy --- meteorology --- diffraction grating --- grating pitch --- mode-locked femtosecond laser --- laser diffraction --- diffraction equation --- measurement uncertainty analysis --- image processing --- pattern recognition --- wind energy turbines --- turbulence wedges --- coherence scanning interferometry --- in-process application --- Mirau interferometer --- vibration compensation --- interferometric distance sensor --- optical path length modulation --- oscillating reference mirror --- hairpin --- laser welding --- semantic segmentation --- dilated convolution --- sdu-net --- spatter detection --- quality assurance --- fast prediction time --- in situ measurement --- optical metrology --- quality control --- interferometry --- fringe projection --- computational shear interferometry --- coherence function --- structure function --- additive manufacturing --- medium voltage switchgear --- SF6 alternatives --- UV-Vis spectroscopy --- gas mixing modeling --- multicomponent diffusion analysis --- explosion --- coal dust --- methane --- explosion suppression --- spectral characteristics --- explosion pressure --- radiation intensity --- free radicals --- speckle photography --- in-process measurement --- deep rolling process --- generalized phase shifting interferometry --- dual-aperture common-path interferometer --- real-time optical instrumentation --- optomechatronic systems --- electrical steel --- optical coherence tomography --- OCT --- scanning --- process monitoring --- laser material processing --- spot compensation --- low coherence interferometry --- LCI --- wind lidar --- Doppler lidar --- bistatic --- metrology --- traceability --- wind energy --- meteorology --- diffraction grating --- grating pitch --- mode-locked femtosecond laser --- laser diffraction --- diffraction equation --- measurement uncertainty analysis --- image processing --- pattern recognition --- wind energy turbines --- turbulence wedges --- coherence scanning interferometry --- in-process application --- Mirau interferometer --- vibration compensation --- interferometric distance sensor --- optical path length modulation --- oscillating reference mirror --- hairpin --- laser welding --- semantic segmentation --- dilated convolution --- sdu-net --- spatter detection --- quality assurance --- fast prediction time --- in situ measurement --- optical metrology --- quality control --- interferometry --- fringe projection --- computational shear interferometry --- coherence function --- structure function --- additive manufacturing --- medium voltage switchgear --- SF6 alternatives --- UV-Vis spectroscopy --- gas mixing modeling --- multicomponent diffusion analysis --- explosion --- coal dust --- methane --- explosion suppression --- spectral characteristics --- explosion pressure --- radiation intensity --- free radicals