Design for stray-light reduction to a Martian ionospheric imager

Hiromu Nakagawa; Atsushi Yamazaki; Keigo Enya; Naofumi Fujishiro; Naoki Terada; Kanako Seki

doi:10.1364/AO.401523

Design for stray-light reduction to a Martian ionospheric imager

Hiromu Nakagawa, Atsushi Yamazaki, Keigo Enya, Naofumi Fujishiro, Naoki Terada, Kanako Seki

SCI - Geophysics

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm stray-light performance with ∼10⁻⁸ rejection viewing as close as 1.0^◦ to a bright-light source. The present improvement replaces the conventional normal-edge vane by an edge with microscopic Gaussian-shaped structures. This permits simplified fabrication, provides even more weight reduction, and delivers improved performance for a given size.

Original language	English
Pages (from-to)	9937-9943
Number of pages	7
Journal	Applied optics
Volume	59
Issue number	32
DOIs	https://doi.org/10.1364/AO.401523
Publication status	Published - 2020 Nov 10

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.401523

Cite this

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title = "Design for stray-light reduction to a Martian ionospheric imager",

abstract = "We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm stray-light performance with ∼10−8 rejection viewing as close as 1.0◦ to a bright-light source. The present improvement replaces the conventional normal-edge vane by an edge with microscopic Gaussian-shaped structures. This permits simplified fabrication, provides even more weight reduction, and delivers improved performance for a given size.",

author = "Hiromu Nakagawa and Atsushi Yamazaki and Keigo Enya and Naofumi Fujishiro and Naoki Terada and Kanako Seki",

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AU - Nakagawa, Hiromu

AU - Yamazaki, Atsushi

AU - Enya, Keigo

AU - Fujishiro, Naofumi

AU - Terada, Naoki

AU - Seki, Kanako

N1 - Funding Information: Acknowledgment. This work was supported by the joint research program of the Planetary Plasma and Atmospheric Research Center (PPARC), Tohoku University, and by the Payload Basic Development Program of the Institute of Space and Astronautical Science (ISAS), Japan Aerospace and Exploration Agency (JAXA). Publisher Copyright: © 2020 Optical Society of America

PY - 2020/11/10

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N2 - We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm stray-light performance with ∼10−8 rejection viewing as close as 1.0◦ to a bright-light source. The present improvement replaces the conventional normal-edge vane by an edge with microscopic Gaussian-shaped structures. This permits simplified fabrication, provides even more weight reduction, and delivers improved performance for a given size.

AB - We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm stray-light performance with ∼10−8 rejection viewing as close as 1.0◦ to a bright-light source. The present improvement replaces the conventional normal-edge vane by an edge with microscopic Gaussian-shaped structures. This permits simplified fabrication, provides even more weight reduction, and delivers improved performance for a given size.

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Design for stray-light reduction to a Martian ionospheric imager

Abstract

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