Comparative Study of Manufacturing Techniques for Coronagraphic Binary Pupil Masks: Masks on Substrates and Free-Standing Masks
Comparative Study of Manufacturing Techniques for Coronagraphic Binary Pupil Masks: Masks on Substrates and Free-Standing Masks
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冠状二元瞳孔掩模制造技术的比较研究:基底掩模和独立式掩模
DOI:
10.1093/pasj/64.6.123
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发表时间:
2012
影响因子:
2.3
通讯作者:
L. Abe
中科院分区:
文献类型:
--
作者:
K. Enya;K. Haze;T. Kotani;L. Abe
We present a comparative study of the manufacture of binary pupil masks for coronagraphic observations of exoplanets. A checkerboard mask design, a type of binary pupil mask design, was adopted, and identical patterns of the same size were used for all the masks in order that we could compare the differences resulting from the different manufacturing methods. The masks on substrates had aluminum checkerboard patterns with thicknesses of 0.1/0.2/0.4/0.8/1.6$\mu$m constructed on substrates of BK7 glass, silicon, and germanium using photolithography and chemical processes. Free-standing masks made of copper and nickel with thicknesses of 2/5/10/20$\mu$m were also realized using photolithography and chemical processes, which included careful release from the substrate used as an intermediate step in the manufacture. Coronagraphic experiments using a visible laser were carried out for all the masks on BK7 glass substrate and the free-standing masks. The average contrasts were 8.4$\times10^{-8}$, 1.2$\times10^{-7}$, and 1.2$\times10^{-7}$ for the masks on BK7 substrates, the free-standing copper masks, and the free-standing nickel masks, respectively. No significant correlation was concluded between the contrast and the mask properties. The high contrast masks have the potential to cover the needs of coronagraphs for both ground-based and space-borne telescopes over a wide wavelength range. Especially, their application to the infrared space telescope, SPICA, is appropriate.
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DOI:
10.1117/12.893508
发表时间:
2011
期刊:
Proc.of SPIE
影响因子:
--
作者:
Enya;K.; Abe;L.; Takeuchi;S.; Kotani;T.; Yamamuro;T.
通讯作者:
T.
DOI:
--
发表时间:
2008
期刊:
Astronomy and Astrophysics Volume 480, Issue 3
影响因子:
--
作者:
Enya;K.;Abe;L.;Tanaka;S.;Nakagawa;T.;Haze;K.;Sato;T.;Wakayama;T.
通讯作者:
T.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Haze;K.; Enya;K.; Kotani;T.; Abe;L.; Nakagawa;T.; Aono;K.; Sato;T.; Yamamuro;T.
通讯作者:
T.
DOI:
--
发表时间:
2010
期刊:
Proceedings of SPIE 7010
影响因子:
--
作者:
Kobayashi;N.;Sarugaku;Y.;Ikeda Y.;Kawakita H.;Enya K.;Nakagawa T.;Kataza H.;Matsuhara H.;Hirahara Y.;Tokoro H.
通讯作者:
Tokoro H.
DOI:
--
发表时间:
2006
期刊:
Publications of the Astronomical Society of Japan Vol.58, No.3
影响因子:
--
作者:
Tanaka;Shinichiro;Enya;Keigo;Abe;Lyu;Nakagawa;Takao; et al.
通讯作者:
Takao; et al.