Mathematical analysis of hexagonal source arrangement for making uniform reflective aluminum coatings

D. A. Sheikh; Manuel A. Quijada; Javier Del Hoya; Joseph G. Richardson

doi:10.1117/12.2529530

9 September 2019 Mathematical analysis of hexagonal source arrangement for making uniform reflective aluminum coatings

D. A. Sheikh, Manuel A. Quijada, Javier Del Hoya, Joseph G. Richardson

Proceedings Volume 11116, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II; 111160Q (2019) https://doi.org/10.1117/12.2529530
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

This paper presents modeling results for coating thickness as a function of position, for aluminum films made with a hexagonal array of evaporation sources. The computer simulation is based on measured plume data from a single evaporation source. The model is used to determine optimum source spacing for a given plume shape. The analysis revealed that arrangement of multiple sources in a hexagonal array can produce uniform coatings while utilizing a reasonable number of evaporation sources per square meter of coating area. Monte Carlo simulations followed by gradient descent optimization methods were used to determine optimal flatness solutions for groups of deposition sources with varied deposition times. Thin aluminum films with exceptional coating flatness are needed to meet the wavefront error requirements of future space-based telescope concepts such as HabEx, LUVOIR, CETUS and others.

Conference Presentation

Citation Download Citation

D. A. Sheikh, Manuel A. Quijada, Javier Del Hoya, and Joseph G. Richardson "Mathematical analysis of hexagonal source arrangement for making uniform reflective aluminum coatings", Proc. SPIE 11116, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II, 111160Q (9 September 2019); https://doi.org/10.1117/12.2529530

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