High uniformity IBS coatings for the world’s largest Fabry-Perot etalon of the VTF instrument

L. Pinard; C. Michel; B. Sassolas; J. Teillon; G. Cagnoli; M. Sigwarth; T. Kentischer; W. Schmidt; B. Reichman

doi:10.1117/12.2312007

10 July 2018 High uniformity IBS coatings for the world’s largest Fabry-Perot etalon of the VTF instrument

L. Pinard, C. Michel, B. Sassolas, J. Teillon, G. Cagnoli, M. Sigwarth, T. Kentischer, W. Schmidt, B. Reichman

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 107061R (2018) https://doi.org/10.1117/12.2312007
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The first large Fabry-Perot etalon (Ø35 cm) of the VTF instrument was coated successfully using IBS technique. The High Reflective (HR) coatings need to meet the reflectivity specifications (95 +/- 1%) over the entire wavelength range 520-870 nm and the entire aperture (Ø25 cm) and also preserve the plate's flatness and airgap uniformity between the two platesto be better than 3 nm RMS. The change of the figure error of the individual faces after HR coating was exceptionally small: For plate 1 (upper) it changed from 1.7nm RMS before coating to 2.12 nm after coating, no change at all for plate 2 (lower).

Conference Presentation

Citation Download Citation

L. Pinard, C. Michel, B. Sassolas, J. Teillon, G. Cagnoli, M. Sigwarth, T. Kentischer, W. Schmidt, and B. Reichman "High uniformity IBS coatings for the world’s largest Fabry-Perot etalon of the VTF instrument", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107061R (10 July 2018); https://doi.org/10.1117/12.2312007

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