Optical misalignment sensing for optical aperture synthesis telescope by using phase diversity

2008 ◽  
Author(s):  
Fang Cao ◽  
Yongtian Zhu ◽  
Zhen Wu
Keyword(s):  
Aperture Synthesis ◽  
Optical Aperture ◽  
Phase Diversity

Multi-wavelength Optical Aperture Synthesis

1992 ◽  
Vol 10 (1) ◽  
pp. 71-73 ◽  
Author(s):  
R.G. Marson ◽  
T.R. Bedding ◽  
J.G. Robertson
Keyword(s):  
Radio Astronomy ◽  
Angular Resolution ◽  
Diffraction Limit ◽  
Double Star ◽  
Aperture Synthesis ◽  
Angular Diameter ◽  
Optical Aperture ◽  
Multi Wavelength ◽  
Red Giant ◽  
Large Telescopes

AbstractThe technique of aperture synthesis is well developed in radio astronomy. When applied to the optical regime, aperture synthesis allows one to partially overcome the blurring effects of the atmosphere and increase the angular resolution of large telescopes to the diffraction limit. MAPPIT (Masked APerture-Plane Interference Telescope) is a multi-element interferometer which operates at the coude focus of the 3.9 m Anglo-Australian Telescope. This instrument has recently been reconfigured to operate in a dispersed mode so that simultaneous observations in a band of wavelengths are possible. We will discuss this instrument’s new mode and present observations of the double star δ Sco and an angular diameter of the previously unresolved red giant β Gru.

Research on Sub-Telescopes′ Beams Parallel and Path Difference Adjustment to the Optical Aperture Synthesis Telescope

2009 ◽  
Vol 29 (5) ◽  
pp. 1397-1402 ◽  
Author(s):  
王海涛 Wang Haitao ◽  
朱永凯 Zhu Yongkai ◽  
蔡佳慧 Cai Jiahui ◽  
张雅静 Zhang Yajing ◽  
田贵云 Tian Guiyun
Keyword(s):  
Path Difference ◽  
Aperture Synthesis ◽  
Optical Aperture

scholarly journals On the Importance of Active Image Stabilisation

1984 ◽  
Vol 79 ◽  
pp. 367-378
Author(s):  
J.E. Noordam
Keyword(s):  
Point Source ◽  
Speckle Interferometry ◽  
Aperture Synthesis ◽  
Atmospheric Conditions ◽  
Optical Telescope ◽  
Aperture Diameter ◽  
Logical Approach ◽  
Optical Aperture ◽  
Large Telescopes ◽  
Mirror Telescope

AbstractThe performance of an optical telescope can be improved considerably by opening the shutter only at moments of good seeing. The resulting instantaneous highresolution images must be corrected for shift before adding them all together. The optimum aperture diameter for which this technique works well is 1 meter or less, depending on atmospheric conditions. Image stabilisation not only improves the resolution and thus the point-source sensitivity, but it is also expected to improve the performance of speckle interferometry and optical aperture synthesis. This makes its implementation on large telescopes desirable. While it is certainly possible to do this by treating a large filled aperture like a set of independent subapertures, a much more logical approach would be to build an array of 1-meter telescopes, preferably mounted in a single large frame so that it can be pointed in all directions without extensive pathlength compensation. Such a “Many Mirror Telescope” has many advantages, and is feasible because image stabilisation helps to solve the beam-combining problem.

Optical Aperture Synthesis with the Anglo-Australian Telescope

1989 ◽  
Vol 8 (1) ◽  
pp. 78-80 ◽  
Author(s):  
T. R. Bedding ◽  
J. G. Robertson
Keyword(s):  
High Resolution ◽  
Atmospheric Turbulence ◽  
Aperture Synthesis ◽  
Interferometric Imaging ◽  
Optical Interferometer ◽  
Optical Aperture ◽  
High Resolution Images ◽  
Pupil Plane

AbstractWe propose to construct an optical interferometer to produce high resolution images by aperture synthesis. The interferometer, known as the Masked Aperture Pupil-Plane Interference Telescope (MAPPIT), will be mounted at the coudé focus of the Anglo-Australian Telescope. It will use a non-redundant aperture mask, together with closure phase methods developed for radio VLBI, to overcome the wavefront distortions which are introduced by atmospheric turbulence. By using the techniques of pupil-plane interferometry and wavelength dispersion, it is hoped that MAPPIT will have more sensitivity than many other interferometric imaging projects.

Systems with optical aperture synthesis and their application

1996 ◽  
Vol 17 (2) ◽  
pp. 157-163
Author(s):  
V. N. Kulikov ◽  
A. N. Malov ◽  
L. I. Zhmurova
Keyword(s):  
Aperture Synthesis ◽  
Optical Aperture

Mapping abundance inhomogeneities and magnetic fields of chemically peculiar (CP) stars with optical aperture synthesis arrays

2003 ◽  
Author(s):  
Karine Rousselet-Perraut ◽  
Chantal Stehle ◽  
Thierry Lanz ◽  
Thomas Boudoyen ◽  
Slobodan Jankov ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Aperture Synthesis ◽  
Optical Aperture ◽  
Chemically Peculiar

scholarly journals The COAST Interferometer

1994 ◽  
Vol 158 ◽  
pp. 163-166
Author(s):  
G. C. Cox
Keyword(s):  
High Resolution ◽  
Present Status ◽  
Aperture Synthesis ◽  
Detector System ◽  
Optical Aperture ◽  
Optical Images ◽  
Very High

The Cambridge Optical Aperture Synthesis Telescope (COAST) [1] will be the first instrument of its kind to exploit the techniques of aperture synthesis and closure phase to produce very high resolution (one milliarcsecond) optical images. The instrument will consist of four identical independent mobile 40 cm telescopes, and an optical building incorporating the path compensators and the fringe and acquisition and auto-guider detector systems. The present status is; there are three operational telescopes on site with two fully functional path compensator trolleys, an acquisition and auto-guider system capable of controlling up to four telescopes, correlator and a fringe detector system.

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