Results 151 to 160 of about 23,959 (174)

Stellar Interferometer for Figure Sensing of Orbiting Astronomical Telescopes

Applied Optics, 1974
An interferometric device designed to be located in the focal plane of a large astronomical telescope is presented. The prime application is for the forthcoming large space telescope. The device is to perform interferometry on the optical wavefront arising from a single star after it has propagated through the telescope.
W N, Peters, R A, Arnold, S, Gowrinathan
openaire   +2 more sources

Superconducting electromagnetic actuators for astronomical Fabry-Perot interferometers

IEEE Transactions on Magnetics, 1985
Two types of superconducting electromagnetic actuators-linear and angular-for precise control of Fabry-Perot spectrometer etalons at liquid helium temperature were manufactured and tested successfully. The linear displacement unit (45 Newtons/Amp) has maximum travel of ±44 um with off-axis deviation of less than 1.5 arcseconds for 15 um path.
T. Nishimura, F. Low, K. Shivanandan
openaire   +1 more source

On Long-baseline Amplitude Interferometers in Astronomical Applications

Optica Acta: International Journal of Optics, 1978
A generalized long-baseline amplitude interferometer which operates in pupil space is examined. The advantages of working in pupil space are considered by comparison with image space methods. In the absence of chromatic incoherence the pupil space interferometer gives immunity against guiding errors and arbitrarily good signal to noise ratios with ...
A.H. Greenaway, J.C. Dainty
openaire   +1 more source

A HELIUM COOLED FABRY–PEROT INTERFEROMETER FOR INFRARED ASTRONOMICAL SPECTROSCOPY

Infrared Physics, 1976
Abstract We have built a cooled, scanning Fabry-Perot interferometer for astronomical spectroscopy in the ten micron atmospheric window. The reasons for choosing this approach are discussed and details are given of the construction and performance of the prototype instrument.
M.J. Selby, P.R. Jorden, A.D. MacGregor
openaire   +1 more source

Multi-object fixed delay Michelson interferometer for astronomical observation

SPIE Proceedings, 2012
Optical interferometry isn’t only widely applied into optical workshop, but also makes great contribution in astronomical observation. A multi-object fixed delay Michelson interferometer commissioned to search extra-solar planet (exoplanet) is introduced here.
Kai Zhang, Yongtian Zhu, Lei Wang, Yi Chen, Liang Wang   +4 more
openaire   +1 more source

Modeling the quasi-optical performance of CMB astronomical interferometers

SPIE Proceedings, 2008
The Millimeter-Wave Bolometric Interferometer (MBI) is a ground-based instrument designed to measure the polarization anisotropies of the Cosmic Microwave Background (CMB) and contains a number of quasi-optical components, including a complex back-to-back system of corrugated feed-horn antennas. In this paper we use MBI as an example to demonstrate the
Gareth S. Curran, Marcin L. Gradziel, Créidhe O'Sullivan, J. Anthony Murphy, Andrei Korotkov, Siddharth Malu, Peter Timbie, Gregory Tucker   +7 more
openaire   +1 more source

Integrated optics beam combiner at 2.2µm for astronomical interferometers

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011
Integrated optics (IO) is a powerful alternative to classical bulk optics solutions in the context of interferometric combination for astronomy. Very recent results in the near infrared (1.5 to 1.8µm) [1] confirm that integrating a complex single-mode circuit on a small chip presents numerous advantages such as: compact size, stability and self ...
Pierre Labeye, Axelle Nolot, Sébastien Lardenois, Steve Oliver, Laurent Jocou, Karine Perraut, Jean-Philippe Berger, Frank Eisenhauer   +7 more
openaire   +1 more source

Neural Interferometry: Image Reconstruction from Astronomical Interferometers Using Transformer-Conditioned Neural Fields

Proceedings of the AAAI Conference on Artificial Intelligence, 2022
Astronomical interferometry enables a collection of telescopes to achieve angular resolutions comparable to that of a single, much larger telescope. This is achieved by combining simultaneous observations from pairs of telescopes such that the signal is mathematically equivalent to sampling the Fourier domain of the object.
Benjamin Wu, Chao Liu, Benjamin Eckart, Jan Kautz   +3 more
openaire   +1 more source

A cryogenic tunable Fabry-Perot interferometer for astronomical observations

SPIE Proceedings, 2007
The Lockheed Martin - University of Arizona Infrared Spectrometer (LAIRS) is designed to image the emission lines of celestial objects in the 1.3-2.5 μm regime. The Instrument has been built and tested at the Lockheed Martin Space Systems Advanced Technology Center, and demonstrated to work at cryogenic temperatures. The Instrument employs a tunable
Jonathan K. Chow, Leigh Ann Ryder, Ira Chapman, Scott Horner, Peter D. Dean   +4 more
openaire   +1 more source

Astronomical Infrared Spectroscopy with a Connes-Type Interferometer. I. Instrumental

Review of Scientific Instruments, 1971
The construction and operation of a Connes-type Fourier spectrometer are discussed in an astronomical context with a sample of the type of spectra obtained with the system.
Reinhard Beer, Robert H. Norton, Clay H. Seaman   +2 more
openaire   +1 more source