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Gaussian Optics
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Author(s): Mey Chern Loh (Universiti Tunku Abdul Rahman, Malaysia)
Copyright: 2020
Pages: 13
Source title:
Analyzing the Physics of Radio Telescopes and Radio Astronomy
Source Author(s)/Editor(s): Kim Ho Yeap (Universiti Tunku Abdul Rahman, Malaysia)and Kazuhiro Hirasawa (University of Tsukuba, Japan)
DOI: 10.4018/978-1-7998-2381-0.ch007
PurchaseView Gaussian Optics on the publisher's website for pricing and purchasing information. |
Abstract
Analysis of Terahertz waves comes in three main forms, physical optics, geometrical optics, and Gaussian optics. Physical optics has the highest accuracy but it is time consuming when it is applied in the design of large radio telescopes. Also, it is only capable of computing radiation characteristics. Geometrical optics, on the other hand, reduces computational time significantly. But it does not give accurate results when designing telescopes which are to operate at Terahertz frequencies. Gaussian optics is a good trade-off between these two methods and it is a popular approach used in the design of large radio telescopes — particularly those which operate near/in the Terahertz band. Since it accounts for the effects of diffraction, this method produces reasonably accurate results. This chapter describes Gaussian optics, with emphasis given on its application in the design of radio telescopes.
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