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.
Author: | Anne-Catherine Probst, Thorsten DöhringORCiD, Sebastian Zeising, Bianca Salmaso, Manfred StollenwerkORCiD, Laura Proserpio |
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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 |