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Challenges in metrology of mirror segments for X-ray telescopes

  • High angular resolution, large collecting area and reduced weight per unit area are required for astronomical X-ray telescopes of the next generation observatories. New technologies for processing X-ray mirrors are under development to fulfill these needs. One option is to realize a Wolter I type telescope constituted of several hundred nested thin and light-weight X-ray mirror segments. The individual mirror segments need to be coated with an about 100 nm thick film of a high-reflective material to enhance the reflectivity for X-rays. Thereby an accurate shape metrology of the segments is necessary to predict the angular resolution of the astronomical telescope as well as to control the development process of X-ray mirrors. We present the challenges in shape measurements of thin glasses used to control the coating process and first experimental results about the repeatability of the measurements.

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Author:Anne-Catherine Probst, Thorsten DöhringORCiD, Sebastian Zeising, Bianca Salmaso, Manfred StollenwerkORCiD, Laura Proserpio
URL:http://www.upob.de/index.php?option=com_phocadownload&view=category&download=198:8th-high-level-expert-meeting-2017-detailed-programme&id=21:upob-high-level-expert-meetings&Itemid=70
Parent Title (English):Proceedings of the 8th High Level Expert Meeting Asphere Metrology
Publisher:UTOB e.V.
Place of publication:Braunschweig
Document Type:Conference Proceeding
Language:English
Year of Completion:2017
Creating Corporation:Hochschule Aschaffenburg
Contributing Corporation:Osservatorio Astronomico di Brera
Release Date:2017/06/06
Tag:metrology; mirror; telescope
GND Keyword:Spiegelteleskop
Volume:2017
Issue:8
Page Number:4
Urheberrecht:1
research focus :Materials / Innovative Material Processing
Materials / Material Testing & Sensor Technology
Licence (German):Keine Lizenz - es gilt das deutsche Urheberrecht
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