Simulating correction of adjustable optics for an x-ray telescope

Thomas L. Aldcroft; Daniel A. Schwartz; Paul B. Reid; Vincenzo Cotroneo; William N. Davis

doi:10.1117/12.929839

15 October 2012 Simulating correction of adjustable optics for an x-ray telescope

Thomas L. Aldcroft, Daniel A. Schwartz, Paul B. Reid, Vincenzo Cotroneo, William N. Davis

Proceedings Volume 8503, Adaptive X-Ray Optics II; 85030F (2012) https://doi.org/10.1117/12.929839
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

The next generation of large X-ray telescopes with sub-arcsecond resolution will require very thin, highly nested grazing incidence optics. To correct the low order figure errors resulting from initial manufacture, the mounting process, and the effects of going from 1 g during ground alignment to zero g on-orbit, we plan to adjust the shapes via piezoelectric “cells” deposited on the backs of the reflecting surfaces. This presentation investigates how well the corrections might be made. We take a benchmark conical glass element, 410×205 mm, with a 20×20 array of piezoelectric cells 19×9 mm in size. We use finite element analysis to calculate the influence function of each cell. We then simulate the correction via pseudo matrix inversion to calculate the stress to be applied by each cell, considering distortion due to gravity as calculated by finite element analysis, and by putative low order manufacturing distortions described by Legendre polynomials. We describe our algorithm and its performance, and the implications for the sensitivity of the resulting slope errors to the optimization strategy.

Citation Download Citation

Thomas L. Aldcroft, Daniel A. Schwartz, Paul B. Reid, Vincenzo Cotroneo, and William N. Davis "Simulating correction of adjustable optics for an x-ray telescope", Proc. SPIE 8503, Adaptive X-Ray Optics II, 85030F (15 October 2012); https://doi.org/10.1117/12.929839

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