Results 251 to 260 of about 48,891 (290)

The Astronomical Potential of Optical Superconducting Detectors

Experimental Astronomy, 1997
The operational principles, current experimental status, and astronomical potential of a promising new class of optical photon detector based on superconductors is presented.
M.A.C. Perryman, A. Peacock, N. Rando, P. Verhoeve   +3 more
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Josephson Detectors Make Astronomical Observations

Physics Today, 1970
Since the discovery of the Josephson effect, astronomers have been intrigued with the possibility of using junctions of two superconductors connected by a weak link to detect millimeter and submillimeter radiation from astronomical objects. Now Bruce T.
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Advances in detectors for astronomical spectroscopy

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1982
Image-reproducing detectors for ultraviolet, optical and near infrared spectroscopic applications in astronomy are described. Emphasis is placed on detectors of the image photon-counting type and on charge-coupled devices.
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Large format imaging photon detector for astronomical spectroscopy

Review of Scientific Instruments, 1987
We describe the design and development of a large format 40-mm active diameter imaging photon detector. The design comprises an S20 semitransparent photocathode proximity focused onto a stack of two microchannel plates clamped back to back having channel length to diameter ratios of 80:1.
M. Clampin, R. P. Edwin
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The Astronomical Detector

2016
The charge-coupled device (CCD) is the foremost imaging device in observational astronomy. The CCD has high quantum efficiency and linearity compared to film, but it suffers from several sources of noise. We illustrate how to reduce noise by backing and applying flat, bias, and dark frames.
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Integrated detector array preprocessing for infrared astronomical applications

Conference on 'Smart' Sensors, 1978
On-board preprocessing of astronomical data from integrated infrared detector arrays and discrete detectors will allow increases in sensitivity and reductions in costs for observations from cryogenic space telescopes. A variety of preprocessing functions for this application, which could be implemented either through analog on-chip devices or through ...
C. MCCREIGHT, H. LUM
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Considerations about far infrared detectors for astronomical purposes

Infrared Physics, 1973
Abstract In this paper we are dealing with the “throughput” ΩS and with the optical bandwidth Δλ of an IR-detector when it is employed at the focus of a telescope to observe point-like sources. We have found that the maximum signal-to-noise ratio is obtained for ΩS≃ λ2 and Δλ ≃ λ.
B. Carli, F. Melchiorri
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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.
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Detectors for THz astronomical imaging and spectroscopy

IEEE Photonics Conference 2012, 2012
The universe shines very brightly in the THz band. I will describe some of the technological developments that have led to an exponential, Moore's-law improvement in our ability to study the universe at THz frequencies.
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Two-dimensional delay-line anode detector for astronomical imaging

SPIE Proceedings, 1990
Progress is reported in the development and testing of a microchannel-plate anode detector for a satellite-based all-sky survey in the FUV. A preliminary FWHM-resolution value of 6- microns and a linearity of 15 microns have been achieved. Optimization of the electronics should improve the resolution by a factor of four and improve the linearity to 10 ...
Peter G. Friedman, Christopher Martin, Andrew Rasmussen   +2 more
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