Contrats post-doctoraux
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Postdoctoral contract in Optics in Hong Kong (HK) - Hong Kong Polytechnic University
- Le 08/03/2024
- Dans Contrats post-doctoraux
2-year Post-doctoral fellowhip
Description: The ITF-funded project: Towards an Intelligent Eyeglass with Autocorrection, hosted by The Hong Kong Kong Polytechnic University (QS ranking: 65th), is inviting applications for a 2-year postdoctoral contract to develop smart adaptive eyeglasses combining a wearable optics visual analyzer and adaptive corrective focus. The smart adaptive eyeglass aims to capture the natural accommodative dynamics in real-world environments and provide in-depth adaptive optics adjustment for visual training and correction of accommodative deficiencies in presbyopic and low-vision populations.
The candidate will join an international team of experts in the field of Optics (Dr. Alexander Goncharov, Dr Charles-Edouard Leroux, Dr Elie De Lestrange-Anginieur), Visual Science (Dr Elie De Lestrange- Anginieur, Prof. Allen Cheong, Prof George Woo), and Electronics (Prof Eric Cheng) including:
• The School of Optometry (Home | School of Optometry (polyu.edu.hk) and the Department of Electrical and Electronic Engineering Home | Department of Electrical and Electronic Engineering (polyu.edu.hk) at the Hong Kong Polytechnic University,
• the MIPA laboratory Laboratoire MIPA – Mathématiques, Informatique, Physique et Applications (unimes.fr) at the University of Nimes and,
• the Applied Optics group Applied Optics group Applied Optics - University of Galway (nuigalway.ie) at the University of Galway.
As a member of the ITF-project, the postdoctoral candidate will be primarily based in Hong Kong. He/She will work at the School of Optometry – an international research center recognized for its high impact research on refractive anomalies and age-related ocular diseases. The appointee is expected to develop the optomechanical design of the corrective lens system.
The development will involve designing, building, and testing the optics and mechanical housing of the adaptive lens, and contributing to its optomechanical integration into the adaptive optics visual analyzer. Read moreWork location:
Hong Kong Polytechnic University
11 Yuk Choi Road
Hung Hom, Kowloon
Hong KongApplicatipn procedure (resume): Elie De Lestrange-Anginieur (elie.delestrangeanginieur@polyu.edu.hk)
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Postdoctoral position (2 years) on acousto-optical imaging in Paris (75) - Institut Langevin ESPCI
- Le 06/03/2024
- Dans Contrats post-doctoraux
Novel laser sources and real-time detection for in-vivo acousto-optic imaging
Starting september/october 2024Description: Imaging biological tissue with light is a great challenge for the detection of objects (e. g. tumors) at large depth (>cm), since multiple scattering processes prevent from a conventional imaging. The combination of ultrasound (US) and light within the medium allows to retrieve an optical information guided by the ultrasound beam, ballistic at medical application frequencies, e.g. 6MHz. Such a strategy is called Acousto-Optic Imaging (AOI), also called Ultrasound Optical Tomography (UOT), it is based on the acousto-optic effect (AO). Such an imaging is developed by many teams worldwide, in the scope to develop a bi-modal system for Medicine and Biology, in combining complementary contrast with ultrasound (e.g. conventional B-Mode imaging) and light. Many architectures have been studied up to now, but technological bottlenecks remain in order to go beyond a proof of principle. This is due to the weakness of the acousto-optic signal, itself superimposed on a strong speckle background. Among the various techniques developed at Institut Langevin, digital holography is a promising configuration for the detection, using a CMOS camera with a large number of pixels, while data treatment is optimzed with a GPU acquisition scheme. Original US-excitations are used in order to optimize the number of photons tagged by the US. Such a point will be developed by the candidate with a new fully-programmable US-system. Read more
Work location:
The work will be shared between the Institut Langevin (Paris) and the Laboratoire Charles Fabry (Palaiseau)Contact: François Ramaz (francois.ramaz@espci.fr)
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Postdoctoral position (2 years) on Full-field multispectral Mueller in Palaiseau (91) - LPICM
- Le 04/03/2024
- Dans Contrats post-doctoraux
Full-field multispectral Mueller polarimetric imaging for improved surgery of neurological malignancies
Description: Surgery is the crucial step in the treatment of brain tumors, in particular gliomas. While some well-defined tumors, such as metastases, can be removed en bloc, the majority of gliomas, which tend to grow infiltrative in the white matter of brain, are removed in piecemeal. During the surgery, it is essential to identify and respect the boundary between brain tumor and surrounding healthy brain tissue in order to carry out a radical resection of the pathological parts while preserving neurological function. However, solid tumor tissue is often difficult to differentiate from infiltrated white matter during surgery, even using a state-of-the-art intraoperative microscope. A non-complete tumor resection due to poor visualization of tumor margins leads to a worse prognosis for the patients, as the tumors invariably grow back from the remnants. Several imaging techniques (e.g. fluorescence imaging, ultrasound and magnetic resonance imaging) have been implemented for the intraoperative visualization of brain tumors tissue, but all have some drawbacks. In summary, the efforts to visualize brain tumor and reliably identify the interface between healthy and pathological areas during neurosurgery have so far failed for many intrinsic brain tumors. Read more
Work location:
Laboratoire de Physique des Interfaces et des Couches Minces
Ecole polytechnique
Route de Saclay
91128 Palaiseau
FranceContact: Angelo Pierangelo (angelo.pierangelo@polytechnque.edu), Tatiana Novikova (tatiana.novikova@polytechnique.edu)
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Postdoctoral position (2 years) on acousto-optic imaging in Paris (75) - Institut Langevin ESPCI Paris
- Le 16/02/2024
- Dans Contrats post-doctoraux
Novel laser sources and real-time detection for in-vivo acousto-optic imaging
Description: Imaging biological tissue with light is a great challenge for the detection of objects (e. g. tumors) at large depth (>cm), since multiple scattering processes prevent from a conventional imaging. The combination of ultrasound (US) and light within the medium allows to retrieve an optical information guided by the ultrasound beam, ballistic at medical application frequencies, e.g. 6MHz. Such a strategy is called Acousto-Optic Imaging (AOI), also called Ultrasound Optical Tomography (UOT), it is based on the acousto-optic effect (AO). Such an imaging is developed by many teams worldwide, in the scope to develop a bi-modal system for Medicine and Biology, in combining complementary contrast with ultrasound (e.g. conventional B-Mode imaging) and light. Many architectures have been studied up to now, but technological bottlenecks remain in order to go beyond a proof of principle. This is due to the weakness of the acousto-optic signal, itself superimposed on a strong speckle background. Among the various techniques developed at Institut Langevin, digital holography is a promising configuration for the detection, using a CMOS camera with a large number of pixels, while data treatment is optimzed with a GPU acquisition scheme. Original US-excitations are used in order to optimize the number of photons tagged by the US. Such a point will be developed by the candidate with a new fully-programmable US-system. Read more
Work location:
Institut Langevin ESPCI Paris - CNRS UMR 7587
1 rue Jussieu
75005 Paris
FranceContact: François RAMAZ (francois.ramaz@espci.fr)
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Doctoral contract in Visual Optics in Hong Kong (HK) - Hong Kong Polytechnic University
- Le 12/02/2024
- Dans Contrats post-doctoraux
3-year Doctoral contract in Visual Optics
Description: The ITF-funded project: Towards an Intelligent Eyeglass with Autocorrection, hosted by The Hong Kong Kong Polytechnic University (QS ranking: 65th), is inviting applications for a 3-year doctoral contract to develop a smart adaptive eyeglasses combining a wearable optics visual analyzer and an adaptive corrective focus. The smart adaptive eyeglass aims to capture the natural accommodative dynamics in real-world environments and provide in-depth adaptive optics adjustment for visual training and correction of accommodative deficiencies in presbyopic and low-vision populations.
The candidate will join an international team of experts in the field of Optics (Dr. Alexander Goncharov, Dr Charles-Edouard Leroux, Dr Elie De Lestrange-Anginieur), Visual Science (Dr Elie De Lestrange- Anginieur, Prof. Allen Cheong, Prof George Woo), and Electronics (Prof Eric Cheng) including:
• The School of Optometry (Home | School of Optometry (polyu.edu.hk) and the Department of Electrical and Electronic Engineering Home | Department of Electrical and Electronic Engineering (polyu.edu.hk) at the Hong Kong Polytechnic University,
• the MIPA laboratory Laboratoire MIPA – Mathématiques, Informatique, Physique et Applications (unimes.fr) at the University of Nimes and,
• the Applied Optics group Applied Optics group Applied Optics - University of Galway (nuigalway.ie) at the University of Galway.
As a member of the ITF-project, the doctoral candidate will be primarily based in Hong Kong. His/her degree will be delivered by the School of Optometry – an international research center recognized for its high-impact research on refractive anomalies and age-related ocular diseases.
The appointee is expected to design the optics of adaptive eyeglasses, develop wavefront sensing systems integrated into the eyeglasses, and build an adaptive control system for real-time adjustment of the wearer’s focus. Read moreWork location:
Hong Kong Polytechnic University
11 Yuk Choi Road
Hung Hom, Kowloon
Hong KongApplicatipn procedure (resume): Elie De Lestrange-Anginieur (elie.delestrangeanginieur@polyu.edu.hk)
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Ingénieur de recherche CDD (H/F) 9 mois en optique biomédicale à Marseille (13) - Institut Fresnel
- Le 09/01/2024
- Dans Contrats post-doctoraux
Ingénieur de recherche en optique biomédicale (CDD 9 mois H/F)
Description : Dans le contexte applicatif de la chirurgie thyroïdienne assistée (thyroïdectomie) (voir le résumé du projet ci-dessous), vous participerez au développement d'un dispositif expérimental d'imagerie par contraste laser (LSCI). Cela comprendra la mise en place et le test d'un dispositif d'illumination laser et d'un système d'imagerie à contraste speckle. Basé sur l'utilisation de fantômes artificiels de tissus biologiques diffusants, ce dispositif sera d'abord testé sur un échantillon fixe, puis les mesures de vélocimétrie seront validées à l'aide d'un échantillon en déplacement contrôlé. Ces premières étapes nous permettront d'optimiser les temps d'acquisition des images en fonction des vitesses d'écoulement attendues dans les cas cliniques typiques.
Ensuite, vous serez chargé de développer un modèle physique de "fantôme" de tissu vascularisé à l'aide d'un réseau microfluidique, en essayant de reproduire de la manière la plus réaliste possible un tissu biologique absorbant et diffusant, contenant un réseau circulatoire subsurfacique. Une fois ce banc d'essai construit, l'imageur prototype du LSCI sera adapté pour effectuer une série de mesures de test sur cet échantillon réaliste de tissu vascularisé. Enfin, vous aurez l'opportunité de participer au premier test clinique sur tissu humain à l'Hôpital Européen qui nécessitera l'adaptation du dispositif aux contraintes d'utilisation en salle d'opération stérile. Lire la suiteAdresse du poste :
Institut Fresnel
Faculté des Sciences - Avenue Escadrille Normandie-Niémen
13397 Marseille CEDEX
FrancePour postuler (CV, relevés de notes, copies de diplômes, contacts/références des encadrants de stages) : Julien FADE (julien.fade@fresnel.fr)
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Contrat post-doctoral de 18 mois à Marseille (13) - Institut Fresnel
- Le 09/01/2024
- Dans Contrats post-doctoraux
Modélisation physique des télécommunications optiques en espace libre à travers une atmosphère diffusante dans le domaine MWIR
Description : Dans le contexte applicatif des télécommunications optiques en espace libre (FSOT) (voir le résumé du projet ci-dessous), vous serez impliqué dans la modélisation physique et numérique de la propagation des ondes optiques à travers une atmosphère complexe et turbide, et dans l'évaluation de la performance des approches de filtrage des photons balistants dans les gammes de longueurs d'onde SWIR et MWIR. En utilisant des scénarios applicatifs réalistes, et les caractéristiques du milieu (distribution de taille des diffuseurs, type de diffuseurs, propriétés spectroscopiques, propriétés dynamiques...), les propriétés d'absorption, de diffusion et de dépolarisation du milieu seront simulées, en s'appuyant sur des modèles analytiques et validés par des simulations numériques (équation de transfert radiatif vectoriel résolue avec des simulations de Monte-Carlo). L'impact de la propagation de la lumière à travers une atmosphère turbide sur les formes d'onde de modulation temporelle (classique ou basée sur le chaos) encodées sur le faisceau lumineux sera également analysé avec des outils de modélisation similaires, en tenant compte des caractéristiques géométriques du système de télécommunication (par exemple, l'ouverture du dispositif de détection) : cette étude devrait fournir une estimation de la portée et de la largeur de bande maximales de la FSOT en fonction des propriétés du brouillard. Lire la suite
Adresse du poste :
Institut Fresnel
Faculté des Sciences - Avenue Escadrille Normandie-Niémen
13397 Marseille CEDEX
FrancePour postuler : Julien FADE (julien.fade@fresnel.fr)