Digital holography at 10.6 μm

Allaria, E.; Brugioni, Stefano; Nicola, S. De; Ferraro, Pietro; Grilli, Simonetta; Meucci, R.

doi:10.1016/s0030-4018(02)02243-5

Cited by 69 publications

(28 citation statements)

References 14 publications

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“…Since its demonstration in 2003 [1], the use of long-wave infrared (LWIR) CO 2 lasers in Digital Holography (DH) has been shown in an increasing number of applications. In particular it allows observing large objects and in metrology it allows measuring large displacements while rendering holography more immune to environmental perturbations, compared to holography in the visible.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Temperature and Deformations Measurements Using Long-Wave Infrared Speckle Interferometry: A Novel Hybrid Technique for Industrial Nondestructive Testing

Georges¹,

Vandenrijt²,

Thizy³

et al. 2014

Fringe 2013

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Section: Introductionmentioning

confidence: 99%

Simultaneous Temperature and Deformations Measurements Using Long-Wave Infrared Speckle Interferometry: A Novel Hybrid Technique for Industrial Nondestructive Testing

Georges¹,

Vandenrijt²,

Thizy³

et al. 2014

Fringe 2013

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“…If this technique can be used in middle and far infrared (IR) regions in the same way, its breadth of applications can be expanded to various fields, such as analysis of large defects or deformations, medical diagnosis, nondestructive inspection, etc. Regarding for holographic recording media for use in the IR spectrum region, detectors, such as pyroelectric devices, HgCdTe diodes, etc, which are sensitive to IR radiation can record the IR holograms [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical reconstruction of an infrared wavefront utilizing an optical phase modulation device

Miyamoto

Nisiyama

Tomioka

et al. 2007

Optics Communications

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We utilize nitroanisole, that absorbs infrared(IR) radiation as heat, as an optical modulation device based on a thermal process. The nitroanisole exhibits a thermal lens effect, i.e. a temperature dependent refractive index. Hence, the nitroanisole can induce phase modulation to visible light, in direct response to intensity of the incident IR radiation. The proposed method can be used to obtain the phase modulation distribution that corresponds to the IR intensity distribution, i.e. the IR hologram itself, on the nitroanisole by examining the phase map of visible light that is modulated upon passing through the nitroanisole. The IR wavefront can be reconstructed by calculating extracted IR holograms through the Fresnel transform.It is verified that both the amplitude and the phase of the IR wavefront can be reconstructed accurately by proposed method.

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“…Detectors that contain such devices as pyroelectric devices and HgCdTe diodes have been used in applications of IR laser interferometry [1][2][3], non-destructive inspection [4], medical diagnosis [5], etc. In particular, interferometry is very effective for phase measurement, and some studies on plasma measurement [1,2] or digital holography [6] using a CO 2 laser of wavelength 10.6µm have been reported. However, some of the devices used in these techniques have various restrictions, for instance, that they must be used in a cryogenic system, or that the detectors must be arranged in a matrix in order to obtain a two-dimensional image in a single trial.…”

Section: Introductionmentioning

confidence: 99%

Application of the nitroanisole as an infrared detector used in middle infrared interferometer

Miyamoto

Nisiyama

Tomioka

et al. 2006

Optics Communications

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We propose the application of nitroanisole as a detector for middle infrared (mid-IR) interferometry or holography. The present experiment utilizes the liquid form of nitroanisole, which has a thermal lens effect, i.e. a temperature dependent refractive index. Since the nitroanisole absorbs IR radiation as heat, it is possible to estimate the IR intensity distribution on the nitroanisole from the diffraction pattern made by visible laser light that is transmitted through the nitroanisole. In this study, the time resolution and the diffraction efficiency of the nitroanisole was measured under various conditions. The experimental results show that the nitroanisole has a time resolution as high as that of a standard video camera, as well as a high diffraction efficiency and the spatial resolution equivalent to that of a conventional IR camera. Furthermore, we confirmed that the phase shift in mid-IR region can be estimated by analyzing the change in the visible diffraction pattern.

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Digital holography at 10.6 μm

Cited by 69 publications

References 14 publications

Simultaneous Temperature and Deformations Measurements Using Long-Wave Infrared Speckle Interferometry: A Novel Hybrid Technique for Industrial Nondestructive Testing

Simultaneous Temperature and Deformations Measurements Using Long-Wave Infrared Speckle Interferometry: A Novel Hybrid Technique for Industrial Nondestructive Testing

Numerical reconstruction of an infrared wavefront utilizing an optical phase modulation device

Application of the nitroanisole as an infrared detector used in middle infrared interferometer

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