Results 251 to 260 of about 614,140 (290)

P-I-N Diode Detectors for Astronomical Photometry

Applied Optics, 1968
The incident quantum efficiency eta(i)(lambda) and apparent noise input power (ANEP) were measured for two P-I-N photodiodes. Typical values at lambda8000 A are 0.68 x 10(-15) W and 3.3 x 10(-15) W, respectively. Several potential uses of this kind of detector for astronomical photometry and spectrometry are considered.
exaly   +3 more sources

Modeling Micro-Channel Plates as Astronomical Detectors of UV Radiation

2016 13th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE), 2016
The World Space Observatory (WSO) is a space-based ultraviolet (UV) telescope under development by Russia and Spain. Mexico is formalizing its participation in the development of components for some of the instruments on board, such as the detectors that are discussed in this work. In particular, this paper describes a first approach to a computational
Leonardo Trujillo, Miguel Chavez
exaly   +2 more sources

A New Technique of Characterization of the Intrapixel Response of Astronomical Detectors

Proceedings of SPIE, 2014
This paper is devoted to the presentation of a new technique of characterization of the Intra-Pixel Sensitivity Variations (IPSVs) of astronomical detectors. The IPSV is the spatial variation of the sensitivity within a pixel and it was demonstrated that this variation can contribute to the instrument global error.
Laurent M. Mugnier, Guillaume Druart, O Boulade   +2 more
exaly   +2 more sources

Characterization of Detectors for the Italian Astronomical Quantum Photometer Project

Journal of Modern Optics, 2009
In the framework of a national collaboration to bring Quantum Optics concepts to Astronomy, we are involved in finding suitable detectors for this novel application. At ‘INAF Osservatorio Astrofisico di Catania’ and ‘INFN – Laboratori Nazionali del Sud’ laboratories, measurements of electro-optical parameters, such as photon detection efficiency (PDE),
Sergio Billotta, Maria Cristina TIMPANARO, Paolo Finocchiaro   +2 more
exaly   +4 more sources

Ultraviolet Sensitization of Silicon Detectors for Space Astronomical Applications

Applied Optics, 1979
H O Pritchard, R W Nicholls
exaly   +3 more sources

Astronomical Imaging with Infrared Array Detectors

Science, 1988
History shows that progress in astronomy often stems directly from technological innovation and that each portion of the electromagnetic spectrum offers unique insights into the nature of the universe. Most recently, the widespread availability of infrared-sensitive two-dimensional array detectors has led to dramatic improvements in the capabilities of
I, Gatley, D L, Depoy, A M, Fowler
openaire   +2 more sources

DC-Squid Readout for STJ Astronomical Detectors

International Journal of Modern Physics B, 1999
The new generation of astronomical detectors based on Superconducting Tunnel Junctions (STJs) is capable of detecting photons in a wide range of wavelengths, and, in some cases, even of counting single photons. Since these detectors operate at very low temperature (down to 100 mK), a natural candidate for the readout electronics is the dc-SQUID, a ...
G Torrioli, MG Castellano, R Leoni, FV Greco, R Buonanno, F Pedichini, P Carelli   +6 more
openaire   +2 more sources

Astronomical polarimeter with 2-D detector arrays

Applied Optics, 1985
It is shown how fast (50–100 kHz) piezoelastic modulation of the full Stokes vector can be used in combination with large CCD-type detector arrays with long integration times. The technique is to use an optical demodulation system (replacing the lockin amplifiers in corresponding single-channel detector systems).
J O, Stenflo, H, Povel
openaire   +2 more sources

EUV Astronomical Spectroscopy With CCD Detectors

SPIE Proceedings, 1986
The applicability of CCD detectors to astronomical extreme ultraviolet (EUV) spectroscopy (100-1250 A) is discussed. The advantages of CCDs in this spectral region include internal electron yield, the potential for very high quantum efficiency (about 50-90 percent), and broad wavelength response.
R. A. Stern, R. C. Catura, M. M. Blouke, M. Winzenread   +3 more
openaire   +1 more source

Astronomical detectors for .001 to 300000 AA, an overview

Journal of Optics, 1987
A variety of imaging devices are necessary in astronomy, not only to cover the observable electromagnetic spectrum but also because of constraints on time resolution and signal-to-noise. Representative imagers are listed and a few specific applications discussed.
openaire   +1 more source