Role of dynamic holography with photorefractive crystals in a multi-functional sensor for the detection of signature features in movable cultural heritage

Thizy, Cédric; Georges, Marc; Doulgeridis, M.; Kouloumpi, Eleni; Green, Tim; Hackney, Stephen; Tornari, Vivi

doi:10.1117/12.727879

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…The main problem though remains that the impact of vibration of composite objects like artworks, under real travelling conditions is very difficult to be predicted. Other full field techniques used in the topic of structural documentation of canvas, from high to moderate resolution, are photorefractive holography and shearography 8,9,10 but they were not used for assessing the impact of vibration loadings so far.…”

Section: Introductionmentioning

confidence: 99%

Preliminary investigation on monitoring transportation effects by full field methods: a digital holographic speckle pattern interferometry study on canvas paintings

et al. 2011

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A preliminary investigation has taken place employing Digital Holographic Speckle Pattern Interferometry (DHSPI) in order to assess the effect of handling and transportation on canvas paintings. Canvas dummies were used on a series of measurements on a transport simulator which allows reproducible simulation of any transport logs in the laboratory. A number of cycles of controlled vibrations were applied on the samples and after each cycle a measurement with DHSPI was taken to monitor the behavior of the samples while increasing the vibration loading and also to record the conditions under which the first crack appears. The transport simulations in combination with DHSPI monitoring revealed the amplitude of oscillation where the first cracks appear on new canvas paintings and also the way these cracks grow. During the tests it was also feasible to locate areas at risk of future deterioration.

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Section: Introductionmentioning

confidence: 99%

Preliminary investigation on monitoring transportation effects by full field methods: a digital holographic speckle pattern interferometry study on canvas paintings

et al. 2011

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“…Some review papers or textbooks that have been recently published are specifically devoted to the use of digital holography for MEMS behavior investigations. It was used in a variety of applications in deformation metrology and nondestructive testing, 17-20 vibration mode shape observation, 15,17,19,20 cultural heritage, 21 and recently for comparison between measurements and with finite element modelling. 12 The present paper shows the development of a holographic interferometer adapted to MEMS deformation measurements which uses a photorefractive crystal (PRC) as the recording medium for a dynamic hologram recording.…”

Section: Introductionmentioning

confidence: 99%

Photorefractive holographic camera for monitoring deformations of MEMS

Georges

Thizy

2015

J. Micro/Nanolith. MEMS MOEMS

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Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspxAbstract. We present the development of a holographic interferometer based on a dynamic hologram recording with photorefractive crystals of the sillenite family and which is adapted for the observation of MEMS. A compact portable system was already presented in the past and used in various metrology and nondestructive applications on large scattering objects. The great versatility of the instrument, which allows high-resolution measurements, was emphasized. We show the development and achievement of an optical module which can be easily interfaced on the basic instrument, allowing small specular objects' observation. The results of deformation of electrically actuated MEMS are shown. Georges and Thizy: Photorefractive holographic camera for monitoring. . . Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspxFig. 3 Scheme of the principle of the photorefractive holographic camera adapted to MEMS observation. Georges and Thizy: Photorefractive holographic camera for monitoring. . . Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Georges and Thizy: Photorefractive holographic camera for monitoring. . . Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Georges and Thizy: Photorefractive holographic camera for monitoring. . . Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Georges and Thizy: Photorefractive holographic camera for monitoring. . . Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 08/20/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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“…This paper is focussed on the development of a shearography sensor for movable cultural heritage applications and it is one of a series of papers presented by the Multi-Encode Project consortium at O3A Optics for Arts, Architecture and Archaeology. Presentations by the other project partners cover the concept of the project [2] and other optical techniques used to study movable cultural heritage [3,4].…”

Section: Introductionmentioning

confidence: 99%

Shearography as part of a multi-functional sensor for the detection of signature features in movable cultural heritaged

et al. 2007

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This is one of a series of papers submitted by the Multi-Encode Project consortium (006427 (SSPI)). Shearography, a full-field speckle interferometry technique, is applied to the investigation of movable cultural heritage. For this project a portable shearography sensor was developed, with conventional sensor hardware supported by novel algorithms and instrument control software. The sensor has been used for an extensive measurement program, the purpose of which is to develop an Impact Assessment Procedure; this is to determine the capabilities of a shearography sensor in this measurement application. Data from the sensor, which shows the location of defects in the artwork, is stored in a database for future analysis and comparison. The particular advantages identified for incorporating shearography in a multi-functional sensor are the ability to measure unstable objects, such as gently vibrating canvas paintings, adjustable interferometric sensitivity and a different sensitivity parameter (displacement gradient) to the other sensors investigated. This work will assist in fulfilling the aims of the project, the detection of signature features for security purposes and the study of changes in artwork for conservation purposes.

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Role of dynamic holography with photorefractive crystals in a multi-functional sensor for the detection of signature features in movable cultural heritage

Cited by 6 publications

References 14 publications

Preliminary investigation on monitoring transportation effects by full field methods: a digital holographic speckle pattern interferometry study on canvas paintings

Preliminary investigation on monitoring transportation effects by full field methods: a digital holographic speckle pattern interferometry study on canvas paintings

Photorefractive holographic camera for monitoring deformations of MEMS

Shearography as part of a multi-functional sensor for the detection of signature features in movable cultural heritaged

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