High-contrast apodization baffle for instruments onboard solar system exploration missions

K. Enya, A. Yamazaki, H. Nakagawa, N. Teradab, K. Seki, N. Fujishiro, A. Motoyoshi, O. Moriwaki

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

1 Citation (Scopus)

Abstract

Utilized in exploration missions of the solar system. The primary objective of the high-contrast baffle is to reveal atmospheric escape on Mars, while other faint objects around bright sources are potential targets. We diverted heritages studied for exoplanet science and instrumentation to this work. The apodization in this study is realized by an edge with microscopic Gaussian-shaped structures. Simulations confirmed the concept and design of the high-contrast apodization baffle and a lab-scale prototype baffle was manufactured, which comprised a transparent flat substrate and a thin film of aluminum. The experiment was executed using a He-Ne laser with a wavelength of 633 nm. The results obtained show that the apodization by the Gaussian-shaped structure significantly improves the contrast. Achieved contrast is better than 10-6.5and 10-8 at > 0.5° and ? > 1°,respectively, and satisfy the requirement for remote sensing of atmospheric escape on Mars.

Original languageEnglish
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
EditorsRoland Geyl, Ramon Navarro
PublisherSPIE
ISBN (Print)9781510619654
DOIs
Publication statusPublished - 2018
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation III 2018 - Austin, United States
Duration: 2018 Jun 102018 Jun 15

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10706
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation III 2018
Country/TerritoryUnited States
CityAustin
Period18/6/1018/6/15

Keywords

  • Apodization
  • Baffle
  • Experiment
  • High contrast
  • Instrument
  • Solar system exploration

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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