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Event-based pixel sensitive to changes of color and brightness

Publications associées (41)

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Digital holographic microscopy for silicon microsystems metrology

Christian Depeursinge, Yves Delacrétaz

We propose to use digital holographic microscopy (DHM) with an illumination in the near infrared spectrum bandwidth, where the silicon is known to have small absorption. With such an illumination condition, it is possible to observe a wider range of specim ...

SPIE2010

A 2.5 mW 80 dB DR 36 dB SNDR 22 MS/s Logarithmic Pipeline ADC

Jens Anders

A switched-capacitor logarithmic pipeline analog-to-digital converter (ADC) that does not require squaring or any other complex analog function is presented. This approach is attractive where a high dynamic range (DR), but not a high peak SNDR, is required ...

2009

Transmission Illuminance Proxy HDR Imaging: A New Technique to Quantify Luminous Flux

Marilyne Andersen

A technique to measure arbitrarily complex luminous fluxes across large areas is presented. The technique is founded on high-dynamic range (HDR) imaging technology and can be achieved using a standard consumer digital camera and everyday materials such as ...

SAGE Publications2009

Towards Large Scale CMOS Single-Photon Detector Arrays for Lab-on-Chip Applications

Edoardo Charbon

Single-photon detection is useful in many domains requiring time-resolved imaging, high sensitivity and high dynamic range. In this paper the miniaturization and performance potential of solid-state single-photon detectors are discussed in the context of l ...

2008

Photorefractive properties of lithium niobate crystals doped with manganese

Demetri Psaltis

The photorefractive properties of lithium niobate crystals doped with manganese (Mn) have been investigated. It is found that the effect of dark decay due to electron tunneling, which is the limiting factor of the highest practical doping level, is less in ...

2003

Photorefractive recording in LiNbO3 : Mn

Demetri Psaltis

The dynamic range, sensitivity, and dark decay of holographic recording of wavelength 458 nm in LiNbO3 crystals doped with 0.2-at. % Mn with different oxidation states have been measured. The measured sensitivity is 0.5 cm/J and is found to be independent ...

2002

System measure for persistence in holographic recording and application to singly-doped and doubly-doped lithium niobate

Demetri Psaltis

We define a measure for persistence in holographic recording. Using this measure and the known measures for dynamic range and sensitivity, we compare the performance of singly-doped and doubly-doped LiNbO3 crystals. We show that the range of performance th ...

2001

An adaptive structure for sigma delta modulation with improved dynamic range

Ali H. Sayed

This work proposes a novel structure for adaptive sigma delta modulation that leads to considerable improvement in the dynamic range of the modulator. The quantizer step-size is adapted based on estimates of the input signal to the quantizer block rather t ...

2000

High resolution optical low coherence reflectometry in biological tissues

Optical low coherence reflectometry (OLCR) is a technique that permits to measure the absolute position and to determine optical properties. It is based on an interferometric method that uses a probe light characterized by a broad spectrum. Small volumes l ...

EPFL1994

Recording Of Multiple Holograms In Photopolymer Films

Demetri Psaltis

Multiple images were recorded in DuPont HRF-150 photopolymer as transmission holograms by using angle multiplexing. Agreement with Kogelnik's two-wave diffraction theory for phase gratings, the time considerations and its effect on dynamic range, the neces ...

1992