Thin mirror surface figure correctability using ultrafast laser stress figuring (ULSF): from X-ray optics to thin shells for deformable mirrors

Joshua C. Richards, Brandon D. Chalifoux, Chang Jin Oh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ultrafast laser stress figuring (ULSF), in which ultrafast laser-generated bending moments permanently deform mirror substrates, has been previously demonstrated to flatten 100 mm-diameter mirror substrates by ~5 μm RMS to ~10 nm RMS flatness. For significantly larger magnitude or higher spatial-frequency corrections, however, a substrate cannot be fully corrected due to limited space available in the substrate. A predictive model of the magnitudes and spatial frequencies that ULSF is capable of correcting is needed to implement ULSF for mirror substrate manufacturing. To this end, corrections of randomly generated surface maps were simulated, using linear optimization of the correctable RMS height error, to understand the capabilities of ULSF correction. This paper describes the mechanics of ULSF and the optimization process to minimize achievable height error. We also report on the ULSF process capabilities gleaned from the simulations.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2024
Subtitle of host publicationUltraviolet to Gamma Ray
EditorsJan-Willem A. den Herder, Shouleh Nikzad, Kazuhiro Nakazawa
PublisherSPIE
ISBN (Electronic)9781510675094
DOIs
StatePublished - 2024
EventSpace Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray - Yokohama, Japan
Duration: Jun 16 2024Jun 21 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume13093
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSpace Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray
Country/TerritoryJapan
CityYokohama
Period6/16/246/21/24

Keywords

  • Thin optics
  • X-ray optics
  • adaptive optics
  • optical fabrication
  • ultrafast laser processing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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