Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Design of a derotator for the 4 in DAG telescope
Date
2016-06-30
Author
Baudet, Jeremie
Jolissaint, Laurent
KESKİN, ONUR
YEŞİLYAPRAK, Cahit
Yerli, Sinan Kaan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
21
views
0
downloads
Cite This
This paper Silt our work on the design of a field derotator for the adaptive optics instruments platform of DAG (Dogu Anadolu Cozier vi), a new 4 in telescope for astronomical observations near the city of krzurum, l'urkey. While the telescopefollows an astronomical object, its pupil sees a rotation of the object around the optical axis which depends n the telescope geographic coordinate and the object sky coordinate. This effect is called the field rotation. This rotation needs to be compensated during the astronomical object data acquisition. In this report we demonstrate the feasibility of placing the derotator (a. K-mirror design) in the telescope fork central hole and propose a preliminary design, considering flexures.
Subject Keywords
Held derotator
,
Field rotation
,
Alt-az mount
,
Ritchey-Chretien
,
Nasmyth
,
K-mirror
,
Dove prism
URI
https://hdl.handle.net/11511/42074
DOI
https://doi.org/10.1117/12.2234392
Collections
Department of Physics, Conference / Seminar
Suggestions
OpenMETU
Core
The design of an adaptive optics telescope : the case of DAG
Jolissaint, Laurent; KESKİN, ONUR; Zago, Lorenzo; Yerli, Sinan Kaan; YEŞİLYAPRAK, Cahit; Mudry, Emeric; Lousberg, Gregory (2016-07-01)
In this paper, we describe in detail the optical design of DAG, a new 4 m telescope for Turkey. DAG is an ”adaptive optics friendly” telescope, in a sense that each design decision is taken considering the potential impact on the AO performance (vibrations, static aberrations etc.) The objective is to make this telescope fully ready for AO at first light. It is designed as a Ritchey-Chr´etien combination, 56 m focal length, with Nasmyth foci only, and active optics. Its total RMS error is expected to be 45 ...
Design and development of a complex shear modulus measurement setup for viscoelastic materials
Özgen, Gökhan Osman (2005-01-01)
Details of the design and development study of a complex shear modulus measurement setup for viscoelastic materials have been presented in this paper. The new setup is specifically designed for measuring the complex shear modulus of pressure sensitive adhesives. The setup consists of a rigid block that is connected to a rigid fixture through two identical shear specimens of the viscoelastic material to be tested. The rigid block and the shear specimens resemble a single degree of freedom system. Once the fr...
Design and realization a quasi yagi antenna array and its feed system printed on a ceramic substrate for x-band radar applications
Atabay, Berkay; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2019)
This thesis includes design, simulation, realization and measurement of a four-element quasi- Yagi antenna array printed on a ceramic substrate for X-band radar applications. The microstrip array antenna is designed using four quasi-Yagi antennas in a linear configuration and is printed on Alumina 99.6% substrate made by Coorstek Corporation. The antenna can fit into small areas because of compact structure due to the use of high dielectric constant substrates. In addition, the use of alumina ceramic substr...
DESIGN, ANALYSIS AND IMPLEMENTATION OF QUARTER-WAVE ABSORBER STRUCTURE FOR UNCOOLED INFRARED DETECTORS WITH HIGH FILL FACTOR
Cetin, Ramazan; Erturk, Ozan; Akın, Tayfun (2018-09-14)
This study presents design, analysis, optimization, and fabrication of umbrella structures as an efficient quarter wave absorber within the Long Wave Infrared (LWIR) range for uncooled IR detectors. Both the effect of the ni-chrome (NiCr) layer and effect of varying pixel pitch sizes on the IR absorption performance of the umbrella structures are examined. An average of 96% absorption is measured for the optimized case within the LWIR range.
Fabrication of Ag Nanoparticles Embedded in Al:ZnO as Potential Light-Trapping Plasmonic Interface for Thin Film Solar Cells
Nasser, Hisham; Saleh, Zaki M.; Ozkol, Engin; Gunoven, Mete; Bek, Alpan; Turan, Raşit (Springer Science and Business Media LLC, 2013-09-01)
Incident photon conversion efficiency of the absorbing materials at either side of a thin film solar module can be enhanced by integrating a plasmonic interface. Silver nanoparticles represent a good candidate that can be integrated to a thin film solar cell for efficient light-trapping. The aim of this work is to fabricate plasmonically active interface consisting of Ag nanoparticles embedded in Al:ZnO that has the potential to be used at the front surface and at the back reflector of a thin film solar cel...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
J. Baudet, L. Jolissaint, O. KESKİN, C. YEŞİLYAPRAK, and S. K. Yerli, “Design of a derotator for the 4 in DAG telescope,” 2016, vol. 9908, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42074.