Archive for the ‘Papers’ Category

Technical Paper – Starlight Image Sensor Technology

How deep is the night?

Teledyne e2v has published this article on the latest technologies dedicated to vision in extreme darkness. Low-light applications require sufficient video throughput, signal-to-noise ratio, and spatial resolution to allow human interpretation of a complex scene passing through the digitization channel. It is therefore essential that the pixels be of optimum size and highly sensitive: every photon counts. Similarly, starlight sensor technology is a key factor, along with electronic noise suppression, to achieve exceptional sensitivity and clear night vision. The new FDPD (“fully depleted pinned photodiode”) technology makes this possible, while offering the best response in the near infrared. The QE and MTF performance at 950nm are demonstrated to be among the best in the field. The circuit is flexibly operated and incorporates low-level digital processing for image quality enhancement, such as high dynamic range (HDR) and fixed pattern noise (FPN) correction.

By Teledyne e2v’s Pierre Fereyre, Bruno Gili, Stéphane Gesset, Alexandre Charlet, Séverine André and Philippe Kuntz.

Technical paper download - Starlight Image Sensor Technology

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OPTRO 2020 Paper – Design-to-Technology for Night Vision

International Symposium on Optronics in Defence and Security (OPTRO), January 2020
Session: Sensors and Components N°53

Design-to-Technology for Night Vision

Pierre Fereyre, Philippe Kuntz, Séverine André, José Ángel Segovia De La Torre & Rémi Barbier

Introduction

The market for night vision represents a wide panel of applications which purpose is to assist operators in visual analysis of scene mostly with requirements of mobility and low power solutions. Modern systems are digital with high-end image processing to enable unambiguous scene analysis. It remains that the intrinsic performance of image sensors is essential. Ideally, in extreme low light conditions, every available photon must contribute to the signal and every detail of the image must be properly resolved. This paper explores key sensors parameters, models and metrics to evaluate low light performance.

Technical paper download

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Has 3D Finally Come of Age?

Has 3D finally come of age?

By Ha Lan Do Thu, Marketing Manager and Pierre Fereyre, Sr. Principal Engineer Image Sensor Design

If you looked only at the movie industry, you could be forgiven for thinking that 3D was a failure. Repeatedly, 3D has been promoted as the next big thing in movies, only for it to fade within months of its last showing. In the perhaps less glamourous world of machine vision, where 3D imaging remains several years behind 2D in terms of image quality, rendering, and ease of use (despite the hype and financial successes to date) it is seeing a resurgence for a growing number of applications. In this post, we will provide some background for four popular techniques for 3D imaging.

Read the full article here.

CMOS Image Sensors are Entering a New Age

CMOS Image Sensors are entering a new age

Pierre Fereyre, Gareth Powell

In the early 90’s, it was suggested that Charge Coupled Devices (CCDs) were in the process of becoming extinct and considered to be ‘technological dinosaurs’ [1]. The prediction is not entirely wrong, if the announcement made by Sony in 2015 is taken as an example. Sony Corporation has officially announced the end of the mass production of CCD and has entered into the last buy order procedure. While this announcement was expected for many years, it has caused a stir within the professional imaging community [2]. It is interesting to note that many industrial or professional applications (where CMOS Image Sensor (CIS) technology was expected to dominate) are still based on CCD sensors. Which characteristics still make CCDs more attractive that are not available with a CIS?

Download the full paper here.