Revolutionary astrophysics using an incoherent synthetic optical aperture

2017 ◽  
Author(s):  
Supriya Chakrabarti ◽  
Gerard L. Rafanelli ◽  
Susan B. Spencer ◽  
Douglas W. Wolfe ◽  
Ronald S. Polidan ◽  
...  
Keyword(s):  
Optical Aperture

A Novel Design for a Low-Backscatter Optical Aperture

2001 ◽  
Author(s):  
Clarence E. Rash ◽  
John C. Mora
Keyword(s):  
Optical Aperture ◽  
Novel Design

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.

Imaging

2019 ◽  
pp. 382-434
Author(s):  
B. D. Guenther
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Noise Intensity ◽  
Imaging System ◽  
Optical Transfer Function ◽  
Modulation Transfer ◽  
Optical Aperture ◽  
System Properties ◽  
Incoherent Imaging ◽  
Optical Transfer

Treating an imaging system as a linear system and use llinear system properties to d iscuss both coherent and incoherent imaging. Use a one dimensional pin hole camera to study the theory of incoherent imaging. Two different criteria, Rayleigh and Sparrow, are used to define the resolution limits of the camera. From the simple theory define the optical transfer function and the modulation transfer function as appropriate characterizations of complex imaging systems. A review of the human imaging system emphasizes tits idfferences with man made cameras. Coherent imaging is based on Abbe’s theory of microscopy. A simple 4f imaging system can be used to understand how spatial resolution is limited by the optical aperture and by controlling the aperture, we can enhance the edges of an image or remove noise intensity noise on a plane wave. Apodizing the aperture allows astronomers to locate planents orbiting distant stars.

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

Simultaneous characterization of the shape and refractive index of transparent living cells by an optical aperture

2010 ◽  
Vol 49 (33) ◽  
pp. 6416 ◽  
Author(s):  
Xiaodong Zhou ◽  
Kai Yu Liu ◽  
Nan Zhang ◽  
Christina Tan
Keyword(s):  
Refractive Index ◽  
Living Cells ◽  
Optical Aperture

A Faraday isolator with a square optical aperture

2015 ◽  
Vol 338 ◽  
pp. 565-568 ◽  
Author(s):  
Еvgeniy А. Mironov ◽  
Аlexey V. Starobor ◽  
Аlexander V. Voitovich ◽  
Оleg V. Palashov
Keyword(s):  
Optical Aperture ◽  
Faraday Isolator
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