Micro-roughness improvement of slumped glass foils for x-ray telescopes via dip coating

B. Salmaso; A. Bianco; O. Citterio; G. Pareschi; G. Pariani; L. Preserpio; D. Spiga; D. Mandelli; M. Negri

doi:10.1117/12.2024193

26 September 2013 Micro-roughness improvement of slumped glass foils for x-ray telescopes via dip coating

B. Salmaso, A. Bianco, O. Citterio, G. Pareschi, G. Pariani, L. Preserpio, D. Spiga, D. Mandelli, M. Negri

Proceedings Volume 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI; 88610W (2013) https://doi.org/10.1117/12.2024193
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The large effective area requirement for future X-ray telescopes demands the production of thousands of segments made of a light material, shaped and integrated into the final optics. At INAF/Osservatorio Astronomico di Brera we developed a direct hot slumping technique assisted by pressure, to replicate the shape of a mould onto the optical surface of a glass mirror segment. To date, the best results were achieved with a mould in Zerodur K20 and glass foils made of aluminumborosilicate glass type AF32 by Schott. Nevertheless, several factors in the fabrication process trigger deviations from the desired surface micro-roughness. A dip-coating technique is investigated to improve the surface smoothness and consequently the imaging properties of the mirror. In this paper we describe the coating technique, the different implemented processes and the results obtained.

Citation Download Citation

B. Salmaso, A. Bianco, O. Citterio, G. Pareschi, G. Pariani, L. Preserpio, D. Spiga, D. Mandelli, and M. Negri "Micro-roughness improvement of slumped glass foils for x-ray telescopes via dip coating", Proc. SPIE 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI, 88610W (26 September 2013); https://doi.org/10.1117/12.2024193

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available