إنتاج المحززات الهولوغرامیة الحاسوبیة

عدنان صالح العيثاوي

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Publication Date

Tue Dec 01 2009

Journal Name

Iraqi Journal Of Physics

Volume

7

Issue Number

10

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إنتاج المحززات الهولوغرامیة الحاسوبیة

Conical Wavefront

عدنان صالح العيثاوي

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توجد هناك العدید من التطبیقات الهولوغ ا رمیة الحاسوبیة من بینها إنتاج عناصر ضوئیة هولوغ ا رمیة
حیث عن طریقها یمكن إنتاج جبهة أي موجة مرغوبة فیها، حیث (Grating) حاسوبیة والمتمثلة بالمحز ا زت
في .(Binary Synthetic Hologram) اعُتمِدَ في صناعتها على تقنیة الهولوغ ا رمات المصطنعة الثنائیة
وجبهة (Spherical Wavefront) هذا البحث تم بناء محزز هولوغ ا رمي لانتاج جبهة الموجة الكرویة
وهذه الموجات المذكورة سابقاً تم إعادة بنائُها بطریقتین، (Conical Wavefront) الموجة المخروطیة
بصریاً وحاسوبیاً

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Publication Date

Mon Jun 19 2023

Journal Name

Journal Of Engineering

A STUDY OF THE EFFECT OF SEMI-ANGLE OF CONE ON THE VIBRATION CHARACTERISTICS OF CYLINDRICAL-CONICAL COUPLED SHELL STRUCTURE

Coupled

Cylindrical-Conical

Orthotropic

Frequency

Muhsin J.

Adnan D.

Mohsin A.

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In this work, the effect of variation of semi-angle of the conical part on the vibration characteristics of cylindrical-conical coupled structure is investigated. The shell is made of polyester resin reinforced by continuous E-glass fibers. The case is analyzed experimentally and numerically for orthotropic shell structures. The experimental program is conducted by exciting the fabricated structure by an impact hammer and monitoring the response using an attached accelerometer for different semi-angles of the conical part.
Software named SIGVIEW is used to perform the signal processing on the acquired signal in order to measure the natural frequencies and the corresponding mode shapes. The numerical investigation is achieved using ANS

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Publication Date

Tue Jan 01 2013

Journal Name

Iraqi Journal Of Physics

Describing the Wavefront Aberrations of the Hexagonal Aperture Using Modified Zernike Polynomials

Zernike polynomials

Wavefront aberration

Very large telescope

PSF

MTF

Loay

Shatha

Raaid

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n Segmented Optical Telescope (NGST) with hexagonal segment of spherical primary mirror can provide a 3 arc minutes field of view. Extremely Large Telescopes (ELT) in the 100m dimension would have such unprecedented scientific effectiveness that their construction would constitute a milestone comparable to that of the invention of the telescope itself and provide a truly revolutionary insight into the universe. The scientific case and the conceptual feasibility of giant filled aperture telescopes was our interested. Investigating the requirements of these imply for possible technical options in the case of a 100m telescope. For this telescope the considerable interest is the correction of the optical aberrations for the coming wavefront, th

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