Wavefront accuracy of mechanically assembled all-cordierite reflective optical system for cryogenic applications
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Published:2023-04-03
Issue:11
Volume:62
Page:2827
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ISSN:1559-128X
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Container-title:Applied Optics
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language:en
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Short-container-title:Appl. Opt.
Author:
Sarugaku Yuki,
Ikeda Yuji1,
Kobayashi Naoto2,
Kondo Sohei2,
Otsubo Shogo,
Yasui Chikako3,
Kawakita Hideyo4
Affiliation:
1. Photocoding
2. University of Tokyo
3. National Astronomical Observatory of Japan
4. Kyoto Sangyo University
Abstract
Although a reflective optical system can theoretically realize ideal
optical designs, it is not always the optimal choice compared with a
refractive one because of the difficulty in achieving high wavefront
accuracy. A promising solution is to build reflective optical systems
by mechanically assembling all the optical and structural components
made of cordierite, which is a ceramic with a very low thermal
expansion coefficient. Interferometric evaluations of an experimental
product demonstrated that diffraction-limited performance in the
visible wavelength was achieved and maintained even after cooling to
80 K. This new technique may be the most cost-effective method
for utilizing reflective optical systems, especially for cryogenic
applications.
Funder
Strategic Research Foundation at Private
Universities
National Astronomical Observatory of
Japan
Publisher
Optica Publishing Group
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
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