Results 261 to 270 of about 48,747 (277)
Some of the next articles are maybe not open access.
Detectors for THz astronomical imaging and spectroscopy
IEEE Photonics Conference 2012, 2012The 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.
openaire +1 more source
Two-dimensional delay-line anode detector for astronomical imaging
SPIE Proceedings, 1990Progress 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 +2 more
openaire +1 more source
Avalanche diodes as photon-counting detectors in astronomical photometry
SPIE Proceedings, 2000Photon-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
openaire +1 more source
Astronomical spectrometer using a Charge Coupled Device detector
Review of Scientific Instruments, 1980This paper describes a low light level, low resolution astronomical CCD (Charge Coupled Device) spectrometer useful in the spectral range 5000–9000 Å. The instrument has a second CCD channel for direct broad-band photometry of the region around the entrance slit.
openaire +1 more source
Image Detectors for Recording Astronomical Ultraviolet Spectra
1975Various 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.
openaire +1 more source
A solid state detector head for astronomical applications
1977A 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.
openaire +1 more source
The New γ-CFAR Detector For Astronomical Image Processing
1997In this paper, we propose a new constant false alarm rate (CFAR) detector based on a family of gamma kernels which provide the ability to change the scale and shape of a stencil that models the local area in an image. This new detector is called the CFAR detector. The scale and shape can be selected adaptively after training in such a way so as to give
A. D. Nair +2 more
openaire +1 more source
Recent astronomical detector development at the University of Arizona
SPIE Proceedings, 2012The 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 ...
openaire +1 more source
Performance of infrared detectors applied in astronomical telescopes
Earth and Space: From Infrared to Terahertz (ESIT 2022), 2023Xiang yong sheng +6 more
openaire +1 more source
Estimation of detector response in optical astronomical radiometry
Applied Optics, 1987W, Blitzstein +2 more
openaire +2 more sources