Results 261 to 270 of about 3,036 (288)

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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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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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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Avalanche diodes as photon-counting detectors in astronomical photometry

SPIE Proceedings, 2000
Photon-counting silicon avalanche photo-diodes (APDs) offer very high quantum efficiency, and might eventually replace photocathode detectors in high-speed photometry of astronomical objects. Laboratory studies have been performed on both passively and actively quenched APDs.
Dainis Dravins, Daniel Faria, Bo Nilsson
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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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Recent astronomical detector development at the University of Arizona

SPIE Proceedings, 2012
The University of Arizona Imaging Technology Laboratory (ITL) has been developing back illuminated detectors and detector technologies for several astronomical projects in recent years. These projects include the WIYN telescope One Degree Imager (ODI) mosaic of Orthogonal Transfer Array CCDs, the VIRUS detectors for the University of Texas' Hobby ...
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Development of the MIC photon-counting detector for astronomical applications

SPIE Proceedings, 1990
The MIC, a 40-mm intensified microchannel-plate photo-counting detector being developed for the Anglo-Australian, Isaac Newton, and William Herschel telescopes, is described and illustrated with diagrams and sample spectra. The MIC is linked by optical fibers to a fast-scanning CCD detector, and an accurate centroiding technique is applied to yield an ...
John L. A. Fordham, David A. Bone, Timothy J. Norton, Peter D. Read   +3 more
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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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Image Detectors for Recording Astronomical Ultraviolet Spectra

1975
Various image tube devices have been evaluated as possible detectors for astronomical spectroscopic studies. An electrostatic image intensifier coupled by fibre-optics to photographic film has been used to record echelle format spectra. Ultraviolet sensitivity is obtained by coating the detector faceplate with a fluorescent layer.
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A solid state detector head for astronomical applications

2010
A detector head for housing self scanned silicon photo-detector arrays has been constructed for use in astronomy. It employs a unique frozen methanol cooling-"system and, although built specifically for the linear Reticon devices, it is capable of housing other linear or two dimensional monolithic arrays.
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