Effects of telescope secondary mirror spider on optical astronomical imaging

العناوين الأخرى

تأثيرات عنكبوت المرأة الثانوية للتلسكوب على التصوير الفلكي البصري

مقدم أطروحة جامعية

Yusuf, Ammar Faruq

مشرف أطروحة جامعية

Talib, Ali

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفلك و الفضاء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2006

الملخص الإنجليزي

The spiders hold the secondary mirror and control the mirror from vibrations, and also allow the mirror to be tilled.

The diffraction of spiders introduce spikes in the image of the point spread function (PSF).

The literatures have not covering this area very well and there are very few papers concerning imaging with spider apertures.

The work in this thesis demonstrate the effects of these spiders on the actual images of optical astronomical telescope.

First the effects of spider diffraction are studied in terms of imaging a point source.

This involves the Strehl ratio, FWHM of the PSF, the fractional encircled energy, and the MTF.

The study is also extended to examine these effects on the power spectrum of binary stars.

The results show that using curved spiders, no significant effects occur to the diffraction pattern of the aperture.

Finally it should be pointed out here that all the simulations and the results are carried out with MATLAB v7.1

التخصصات الرئيسية

الفلك و علومه

عدد الصفحات

77

قائمة المحتويات

Table of contents.

Abstract.

Abstract in Arabic.

Chapter One : General introduction.

Chapter Two : Image formation model.

Chapter Three : Modeling and simulation.

Chapter Four : Conclusions and future work.

References.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Yusuf, Ammar Faruq. (2006). Effects of telescope secondary mirror spider on optical astronomical imaging. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-603396

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Yusuf, Ammar Faruq. Effects of telescope secondary mirror spider on optical astronomical imaging. (Master's theses Theses and Dissertations Master). University of Baghdad. (2006).
https://search.emarefa.net/detail/BIM-603396

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Yusuf, Ammar Faruq. (2006). Effects of telescope secondary mirror spider on optical astronomical imaging. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-603396

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-603396