Results 141 to 150 of about 3,081 (186)

SPICA mission for mid- and far-infrared astronomy

Proceedings of SPIE, 2008
SPICA (Space Infrared Telescope for Cosmology and Astrophysics) is an astronomical mission optimized for mid- and far-infrared astronomy with a cryogenically cooled 3.5 m telescope. Its high spatial resolution and unprecedented sensitivity in the mid- and far-infrared will enable us to address a number of key problems in present-day astronomy ...
Takao Nakagawa
exaly   +2 more sources

Bolometers for far-infrared and submillimetre astronomy

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Department of Physics, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK Received 31 August 1999; Available online 19 April 2000. Abstract Important scientific goals of far-infrared and submillimetre astronomy include measurements of anisotropies in the cosmic background radiation, deep imaging surveys for detection of high-red ...
M J Griffin
exaly   +2 more sources

Development of GaAs photoconductors for far-infrared/submillimeter astronomy

SPIE Proceedings, 2004
In today's Astronomy, there is little observational results in the spectral window ranging from far-infrared to submillimeter wavelength. As one of the main reason of this, there is no high performance detector in this spectral region. We started the development of the extrinsic photoconductor for this region utlizing shallow donor levels of gallium ...
Kentaroh Watanabe, Hiroshi Murakami, Moriaki Wakaki   +2 more
exaly   +2 more sources

GaAs BIB photodetector development for far-infrared astronomy

SPIE Proceedings, 2004
GaAs photoconductive detectors offer an extended spectral response in the far-infrared (FIR) compared to presently available stressed Ge photoconductors. Furthermore, responsivity at wavelengths up to 330 microns can be reached without having to apply uniaxial stress close to the breaking limit on each pixel.
Nancy Haegel, Eugene E Haller, J W Beeman   +2 more
exaly   +3 more sources

New balloon-borne telescope for far-infrared astronomy

SPIE Proceedings, 2000
We have developed the new balloon-borne telescope, Far Infrared Balloon-Borne Experiment (FIRBE), to survey the far-infrared radiations of star-forming regions. The primary mirror is an offset parabolid with a diameter of 50 cm (F/2) and telescope structure is made from Carbon Fiber Reinforced Plastics to lighten the whole telescope and hold the strain
Yasuo Doi, Mitsunobu Kawada, Haruyuki Okuda   +2 more
exaly   +2 more sources

SPICA: A 3.5m space infrared telescope for mid- and far-infrared astronomy

Advances in Space Research, 2005
Abstract The Space Infrared Telescope for Cosmology and Astrophysics (SPICA) mission is a Japanese astronomical infrared satellite project optimized for mid- to far-infrared observations. It will be launched at ambient temperature and cooled down on orbit by mechanical coolers on board with an efficient radiative cooling system, a combination of ...
Takao Nakagawa, Takashi Onaka
exaly   +2 more sources

The upGREAT heterodyne array receivers for far Infrared astronomy

2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014
Christophe Risacher, Rolf Guesten, Patrick Putz   +2 more
exaly   +2 more sources

A far-infrared polarimeter for balloon astronomy

Infrared Physics, 1978
Abstract We have developed a liquid helium cooled far-infrared polarimeter, designed for astronomical observations with the Imperial College 41 in. balloon telescope.
D.L. Rosen, R.D. Joseph
openaire   +1 more source

Mid- and far-infrared astronomy mission SPICA

Advances in Space Research, 2007
Abstract We present an overview and the current status of SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is an astronomical mission with a cryogenically cooled 3.5 m telescope optimized for mid- and far-infrared astronomy. Because of its high spatial resolution and unprecedented sensitivity in the mid- to far-infrared, SPICA ...
Takao Nakagawa, Hiroshi Murakami
openaire   +1 more source

Filters for Far Infrared Astronomy

1972
In developing far infrared photometers for astronomical purposes one of the main problems is the efficient spectral filtering of the radiation. As a consequence of the unknown spectral distribution of the usually weak radiation of the objects, the filterbands must have a high transmission with steep edges; in addition a specified spectral band and ...
J. J. Wijnbergen, W. H. Moolenaar, G. De Groot   +2 more
openaire   +1 more source