Séminaires et colloques
Séminaires des Doctorants 2014: S. Ben Aziza, A. Choyer
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Europe/Paris
Grand amphi
Grand amphi
Description
S. Ben Aziza: A Programmable Gain Amplifier with 14 bit SAR for high speed CMOS image sensors
Abstract: CMOS technologies represent nowadays more than 90% of image sensors market given their features namely the possibility of integrating entire intelligent systems on the same chip (SoC = System-On-Chip). Thereby, allowing the implementation of more and more complex algorithms in the new generations of image sensors.
New technics have emerged like high dynamic range reconstruction which requires the acquisition of several images to build up one, thus multiplying the frame rate.
These new constraints require a drastic increase of image rate for sensors of considerable size (Up to 30 Mpix and more). At the same time, the ADC resolution has to be increased to be able to extract more details (until 14 bits). With all these demanding specifications, analog-to-digital conversion capabilities have to be boosted as far as possible.
A. Choyer: The Large Synoptic Survey Telescope: Camera calibration and photo-z study
Abstract:The Large Synoptic Survey Telescope (LSST) ranks among the next generation of wide field imagers. With its large field of view, it will cover half of the sky every three nights and will observed billions of galaxies, in six optical photometric bands. Among many science goals, LSST data will provide multiple probes of Dark Energy, such as supernovae, week lensing, Baryon Acoustic Oscillations, etc. This will lead to constraints on dark energy parameters with an unprecedented quality. The key for LSST success is a high accuracy on photometric redshift.
LSST’s camera, with 3 billion pixels, will be the world’s largest digital camera. It will produce data of extremely high quality with minimal downtime and maintenance. In order to take advantage of high-quality images produced over such a wide field, the response of the CCD focal plane has to be perfectly well known. The LPSC is in charge of the development of the optical test bench, which is dedicated to the camera calibration.
After a short introduction on the LSST instrument, the first part of my talk will be dedicated to the Camera Calibration Optical Bench. The second part start with a short review of LSST science goal. Then we will focus on the photometric redshift reconstruction, and, more precisely on the effects of filter’s transmission shape on the photo-z quality.
Abstract: CMOS technologies represent nowadays more than 90% of image sensors market given their features namely the possibility of integrating entire intelligent systems on the same chip (SoC = System-On-Chip). Thereby, allowing the implementation of more and more complex algorithms in the new generations of image sensors.
New technics have emerged like high dynamic range reconstruction which requires the acquisition of several images to build up one, thus multiplying the frame rate.
These new constraints require a drastic increase of image rate for sensors of considerable size (Up to 30 Mpix and more). At the same time, the ADC resolution has to be increased to be able to extract more details (until 14 bits). With all these demanding specifications, analog-to-digital conversion capabilities have to be boosted as far as possible.
A. Choyer: The Large Synoptic Survey Telescope: Camera calibration and photo-z study
Abstract:The Large Synoptic Survey Telescope (LSST) ranks among the next generation of wide field imagers. With its large field of view, it will cover half of the sky every three nights and will observed billions of galaxies, in six optical photometric bands. Among many science goals, LSST data will provide multiple probes of Dark Energy, such as supernovae, week lensing, Baryon Acoustic Oscillations, etc. This will lead to constraints on dark energy parameters with an unprecedented quality. The key for LSST success is a high accuracy on photometric redshift.
LSST’s camera, with 3 billion pixels, will be the world’s largest digital camera. It will produce data of extremely high quality with minimal downtime and maintenance. In order to take advantage of high-quality images produced over such a wide field, the response of the CCD focal plane has to be perfectly well known. The LPSC is in charge of the development of the optical test bench, which is dedicated to the camera calibration.
After a short introduction on the LSST instrument, the first part of my talk will be dedicated to the Camera Calibration Optical Bench. The second part start with a short review of LSST science goal. Then we will focus on the photometric redshift reconstruction, and, more precisely on the effects of filter’s transmission shape on the photo-z quality.