Long‐Wave Infrared Digital Holography

Georges, Marc

doi:10.1002/9781119091745.ch6

Cited by 14 publications

(6 citation statements)

References 52 publications

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“…The use of uncooled array detectors is generally sufficient, as thermal noise from such a camera is on the same order as that from the scene. Microbolometers have been intensively applied for long-wave infrared coherent imaging [81]. Interestingly, the microbolometers designed for the wavelength range 8-14 µm possess better sensitivities than THz microbolometers around 100 µm [82] and thus have become the cameras of choice for lensless imaging applications [35,36,[83][84][85][86][87].…”

Section: Thz Detectorsmentioning

confidence: 99%

THz coherent lensless imaging

et al. 2019

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Imaging with THz radiation has proved an important tool for both fundamental science and industrial use. Here we review a class of THz imaging implementations, named coherent lensless imaging, that reconstruct the coherent response of arbitrary samples with a minimized experimental setup based only on a coherent source and a camera. After discussing the appropriate sources and detectors to perform them, we detail the fundamental principles and implementations of THz digital holography and phase retrieval. These techniques owe a lot to imaging with different wavelengths, yet innovative concepts are also being developed in the THz range and are ready to be applied in other spectral ranges. This makes our review useful for both the THz and imaging communities, and we hope it will foster their interaction.

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Section: Thz Detectorsmentioning

confidence: 99%

THz coherent lensless imaging

et al. 2019

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“…The particularity of our setup is the use of long-wave infrared CO2 laser (10.6 µm) and microbolometer camera. It has already been presented for different nondestructive testing applications and owns several specific interesting properties [2,3]. At such long wave infrared (LWIR) wavelength, objects reflection is more specular than in visible, for a given roughness.…”

Section: Experimental Setup and Dh Principlementioning

confidence: 99%

Digital holographic interferometry application on objects with heterogeneous reflecting properties

Vandenrijt

Zhao

Languy

et al. 2018

Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP)

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“…Digital holographic interferometry (DHI) and electronic speckle pattern interferometry (ESPI) in the long-wave infrared (LWIR) spectral range have been used recently for different applications, through the combination of CO2 lasers with thermal imaging devices for recording numerically digital holograms or specklegrams [1,2]. The latter are compared numerically, giving rise to interference patterns, the so-called interferograms, from which surface displacements can be deduced.…”

Section: Introductionmentioning

confidence: 99%

Digital Holographic Interferometry in the Long-Wave Infrared Range for Measuring Large Deformations of Space Components under Thermal-Vacuum Testing

Vandenrijt

Thizy

Languy

et al. 2018

The 18th International Conference on Experimental Mechanics

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Holographic interferometry at around 10 µm wavelengths has many advantages. It offers the possibility of large deformation measurement, while being much less sensitive to external perturbations. We present the state-of-the art of this technique applied to several industrial cases of the space industry. In particular, we demonstrate that the technique is well adapted to measurement of full-field deformation maps of space structures undergoing large temperature variations typical to what they experience in space conditions.

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Long‐Wave Infrared Digital Holography

Cited by 14 publications

References 52 publications

THz coherent lensless imaging

THz coherent lensless imaging

Digital holographic interferometry application on objects with heterogeneous reflecting properties

Digital Holographic Interferometry in the Long-Wave Infrared Range for Measuring Large Deformations of Space Components under Thermal-Vacuum Testing

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