Mitigating print-through effects through an optimized method for CFRP mirror production in Chile

S. Castillo; G. Hamilton; N. Soto; C. Lobos; L. Pedrero; C. Rozas; A. Bayo; P. Mardones; H. Hakobyan; C. García; M. R. Schreiber; W. Brooks

doi:10.1117/12.2561145

13 December 2020 Mitigating print-through effects through an optimized method for CFRP mirror production in Chile

S. Castillo, G. Hamilton, N. Soto, C. Lobos, L. Pedrero, C. Rozas, A. Bayo, P. Mardones, H. Hakobyan, C. García, M. R. Schreiber, W. Brooks

Author Affiliations +

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114512J (2020) https://doi.org/10.1117/12.2561145
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

In the manufacturing process of Carbon Fiber Reinforced Polymer (CFRP) mirrors (replicated from a mandrel) the orientation of the unidirectional carbon fiber layers (layup) has a direct in influence on different aspects of the final product, like its general (large scale) shape and local deformations. In particular, optical methods used to evaluate the surface's quality, can reveal the presence of print-through, a very common issue in CFPR manufacture. In practical terms, the surface's irregularities induced, among other artifacts, by print-through, produce unwanted scattering effects, which are usually mitigated applying extra layers of different materials to the surface. Since one of the main goals of CFPR mirrors is to decrease the final weight of the whole mirror system, adding more material goes in the opposite direction of that. For this reason a different layup method is being developed with the goal of decreasing print-through and improving sphericity while maintaining mechanical qualities and without the addition of extra material in the process.

Citation Download Citation

S. Castillo, G. Hamilton, N. Soto, C. Lobos, L. Pedrero, C. Rozas, A. Bayo, P. Mardones, H. Hakobyan, C. García, M. R. Schreiber, and W. Brooks "Mitigating print-through effects through an optimized method for CFRP mirror production in Chile", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114512J (13 December 2020); https://doi.org/10.1117/12.2561145

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