24-267 Interferometric Imaging Based On Photonic

Il y a 2 mois

Paris, France CNES - Centre National d'Etudes Spatiales Temps plein

Doctorat, 36 mois
- Temps plein
- Aucune expérience exigée
- Maitrise, IEP, IUP, Bac+4
- Instrumentation

**Mission**:
A concept for an optical interferometric imager was proposed by Lockheed-Martin in the early 2010s. In this concept, the aperture is paved with lenses. The optical signals collected by these lenses are combined in photonic integrated circuits, enabling simultaneous measurement of the Fourier components of the observed object at several spatial frequencies - known as visibilities. This concept makes it possible to significantly reduce the size of optical telescopes, for example for Earth observation. Indeed, the transverse dimension of a device based on this concept remains close to that of a telescope of the same resolution, since the transverse size determines the spatial resolution. On the other hand, its size along the optical axis is much smaller than that of a conventional telescope. Several teams are working on the development of such a concept, notably in the USA and in China. Partial experimental demonstrations have been carried out with planar photonic circuits associated with lines of lenses. At ONERA, the theoretical analysis of this concept was carried out as part of a thesis which has recently been completed.

In the short term, the implementation of this concept proves tricky, both because of the complexity of the photonic circuit - the number of lenses being of the same order of magnitude as the number of sought resolution elements - and because of the instrumental constraints associated with interferometric measurement.

The proposed thesis focuses on the reduction of the complexity of such a concept by combining a low-resolution image formed with a small telescope with visibilities measured at high spatial frequencies. It will be carried out in collaboration with astronomers who are developing instruments based on optical interferometry for astrometry and high contrast imaging. The first part of the thesis will be devoted to the development of an algorithm dedicated to high-resolution image reconstruction with these data and then to its test by numerical simulations. A laboratory experiment will be carried out in the second part of the thesis. Its objective will be to test this concept (measurement of a low-resolution image and visibilities then image reconstruction) and to evaluate the limitations to its experimental implementation. Visibility measurements will be carried out in particular with a planar photonic circuit built using the know-how developed by astronomers in the field. As a planar photonic circuit only allows the measurement of a few visibilities, this work could be complemented by the definition of a three-dimensional photonic circuit allowing access to the simultaneous measurement of a higher number of visibilities, compatible with the reconstruction of a complex image. The PhD student will benefit from the skills in optical instrumentation, the characterization resources and the know-how of the Department of Optics and Associated Techniques at ONERA.

=================

**Profil**:
Physical optics, image processing, programming (Python, Matlab...). Keen interest in optical experimentation and data processing.

**Laboratoire**:
ONERA

**Message from PhD team**:

  • Photonics Engineer

    Il y a 2 mois

    Paris, France Woodoo Temps plein

    w**w**o**o**d**od**o**oo**.c**.c**o**om** LAST YEAR INTERNSHIP / PARIS, FRANCE **PHOTONICS ENGINEER** M/F*** ❶ OUR MISSION*** **We believe in a future where nature and technology could blend, to address the next technological challenges.** Woodoo is specialized in groundbreaking biomaterials based on the structural transformation of wood at the...

  • Photonics Engineer

    il y a 5 jours

    Paris, France Woodoo Temps plein

    w**w**o**o**d**od**o**oo**.c**.c**o**om** INTERNSHIP / PARIS, FRANCE **PHOTONICS ENGINEER** M/F*** ❶ OUR MISSION*** **We believe in a future where nature and technology could blend, to address the next technological challenges.** Woodoo is specialized in groundbreaking biomaterials based on the structural transformation of wood at the...

  • Open Call for Group Leader Positions

    Il y a 2 mois

    Paris 12e, France Institut de la Vision Temps plein

    The Institut de la Vision is an internationally recognized research center in neurosciences, vision and ophthalmology with 18 teams involved in interdisciplinary basic and translational research. The Institut de la Vision brings together a community of scientists with interests in neurobiology, development, genetics, therapeutics, photonics and mathematical...

  • Doctorant (H/F)

    il y a 2 jours

    Paris, France ESYCOM - CNRS UMR 9007 Temps plein

    The applicant should have excenlent academic results. The objective of the thesis is the design of a hybrid sensor based on photonic crystals and localized surface plasmon resonance offering high-sensitivity detection. This photonic sensor operates at telecom wavelengths in order to benefit from heterogeneous III-V silicon technology. **Context** The...

  • 24-068 Gaia/vlbi Blazar Astrometry: a New Vision of

    Il y a 2 mois

    Paris, France CNES - Centre National d'Etudes Spatiales Temps plein

    Doctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Astronomy, Astrophysics **Mission**: Objectives Methods We will adopt a global approach on a sample of hundreds to thousands of AGN observed by geodetic VLBI, Gaia, and imaging VLBI (VLBA and other networks). The first step will be a categorization of sources...

  • Chargé de Communication

    il y a 1 mois

    Paris 14e, France Iconeus Temps plein

    ICONEUS is a Paris-based start-up. A growing team (more than 30 people) is dedicated to developing and commercializing a new ultrasound-based brain imaging modality (functional ultrasound imaging or fUS). This revolutionary method allows the visualization of the brain activity with unprecedented spatio-temporal resolution and high sensitivity. Founded in...

  • Internship - R&D - Event-based Transformers

    il y a 4 semaines

    Paris, France Prophesee Temps plein

    Internship opportunities at Prophesee PROPHESEE Founded by the world’s leading pioneers in the field of neuromorphic vision, Prophesee develops computer vision sensors and systems for application in all fields of artificial vision. The sensor technology is inspired by biological eyes, acquiring visual information in an extremely performing yet...

  • Field Application Specialist- Microscopy Systems

    il y a 1 semaine

    Paris, France Oxford Instruments Plc Temps plein

    **Field Applications Specialist**: Microscopy Systems Andor is a highly innovative, dynamic and progressive technology company at the cutting-edge of scientific research and we are currently going through a period of significant growth and expanding our dynamic Life Sciences team. We have a unique opportunity for an Applications Specialist to support our...

  • Internship - R&D - Live Event-Based Video Reconstruction on the Cloud

    il y a 4 semaines

    Paris, France Prophesee Temps plein

    Internship opportunities at Prophesee PROPHESEE Founded by the world’s leading pioneers in the field of neuromorphic vision, Prophesee develops computer vision sensors and systems for application in all fields of artificial vision. The sensor technology is inspired by biological eyes, acquiring visual information in an extremely performing yet...

  • Internship - R&D - Live Event-Based Video Reconstruction on the Cloud

    il y a 1 semaine

    Paris, France Prophesee Temps plein

    Internship opportunities at Prophesee PROPHESEE Founded by the world’s leading pioneers in the field of neuromorphic vision, Prophesee develops computer vision sensors and systems for application in all fields of artificial vision. The sensor technology is inspired by biological eyes, acquiring visual information in an extremely performing yet...

  • Head of Marketing Southern Europe

    il y a 2 semaines

    Paris, France On Temps plein

    Team for Career Site Marketing In short Welcome to On! We’re the fastest growing premium sportswear brand defined by innovation; on a mission to ignite the human spirit through movement. With a passion for revolutionizing performance-driven products, On is taking the global sports footwear, apparel and accessories market by storm with cutting-edge tech...

  • Head of Marketing Southern Europe

    il y a 1 semaine

    Paris, France On Temps plein

    Team for Career Site Marketing In short Welcome to On! We’re the fastest growing premium sportswear brand defined by innovation; on a mission to ignite the human spirit through movement. With a passion for revolutionizing performance-driven products, On is taking the global sports footwear, apparel and accessories market by storm with cutting-edge tech...

  • Head of Marketing Southern Europe

    il y a 2 semaines

    Paris, Île-de-France On Temps plein

    Team for Career SiteMarketingIn shortWelcome to On We're the fastest growing premium sportswear brand defined by innovation; on a mission to ignite the human spirit through movement. With a passion for revolutionizing performance-driven products, On is taking the global sports footwear, apparel and accessories market by storm with cutting-edge tech and...

  • Head of Marketing Southern Europe

    il y a 1 semaine

    Paris, Île-de-France On Temps plein

    Team for Career SiteMarketingIn shortWelcome to On We're the fastest growing premium sportswear brand defined by innovation; on a mission to ignite the human spirit through movement. With a passion for revolutionizing performance-driven products, On is taking the global sports footwear, apparel and accessories market by storm with cutting-edge tech and...

  • Female Fashion Model

    il y a 3 jours

    Paris, France Talent On Cloud Temps plein

    **Looking for fresh or experienced female models for bold shoots For our client.** **If you are new to this and dont have a portfolio dont worry we will create it for you. Once you are shortlisted based on your pics you should travel to Bangalore with your cost.** Location - Bangalore. Artist should be versatile and have good modelling skills. - Wanted new...

  • Stakeholder & Cg Transport Manager - Olympic &

    il y a 3 jours

    Paris, France On Location Temps plein

    Who We Are: On Location is a premium experience provider, offering world class hospitality, ticketing, curated guest experiences, live event production, and travel management across sports, entertainment, and fashion. From unrivaled access for corporate clients to guests looking for fully immersive experiences at marquee events, On Location is the premier...

  • Application Engineer

    Il y a 2 mois

    Paris 13e, France DAMAE Medical Temps plein

    Among the Clinical Team - in charge of the design, management and monitoring of clinical studies - you play a key role to ensure the optimal use of the deepLive and support R&D teams to improve the device. **You will**: - Provide on-site training and customer support - Create training content - Animate the user community - Design and monitor clinical...

  • Post Doctoral Position in QML

    il y a 2 jours

    Paris, France Quantum Flagship Careers Temps plein

    Post Doctoral Position in QML (Quantum Machine Learning)The Quantum Information (QI) team in LIP6, Sorbonne Université, is looking for a post doctoral researcher in Quantum Machine Learning.The QI team is an interdisciplinary research group covering computer science, theoretical physics and experimental quantum optics. We are based in LIP6, Sorbonne...

  • Guest Experience Manager

    il y a 1 semaine

    Paris, France On Location Temps plein

    Who We Are: On Location is a premium experience provider, offering world class hospitality, ticketing, curated guest experiences, live event production, and travel management across sports, entertainment, and fashion. From unrivaled access for corporate clients to guests looking for fully immersive experiences at marquee events, On Location is the premier...

  • Lead Store Advisor

    il y a 3 semaines

    Paris, France On Temps plein

    Team for Career Site Retail (store team) In short This is your opportunity to become a core part of On’s Direct-to-Consumer (DTC) team based in our Champs Elysees Flagship Store in Paris. On will rely on you to deliver exceptional customer service to each and every customer while embodying On’s core values and passion for movement. Our Store will be the...