A monolithic deformable mirror with latchable mechanical actuation (LATCHAMAN) for space-borne telescopes

Keigo Enya, Hirokazu Kataza, Mitsuhiro Fukushima, Kenji Mitsui, Norio Okada, Hikaru Iwashita, Kanae Haze, Aoi Takahashi, Takayuki Kotani, Tomoyasu Yamamuro, Hitomi Kobayashi

研究成果: Conference contribution

1 被引用数 (Scopus)


We present the concept, design, fabrication, and evaluation of a new deformable mirror (DM), which is latchable, compact, and designed to be applicable for cryogenic environments. The main body of a prototype DM was fabricated from a monolithic cuboid of aluminum using wire electrical discharge machining (EDM). A flexible structure was constructed inside the block by 3-dimensionally crossed hollowing using the EDM. The prototype has 6 × 6 channels, and its volume is 27 mm × 27 mm × 30 mm. The mirror was formed on the surface of the aluminum block using a highprecision NC lathe. The surface figure of the mirror was evaluated and 34 nm rms was obtained. The evaluated surface roughness for the center and off-center areas of the mirror was 9.2 nm rms and 7.6 nm rms, respectively Screws set at the back of the block deform the mirror via springs and the internal flexible structure. We present our first demonstration of deformation of the mirror carried out at ambient temperature. The relationship between the displacement of the screws and the deformation of the mirror was evaluated. Consequently, a linear relationship was confirmed, and no significant hysteresis was found. The application of such mirrors to telescopes used for various different objectives is discussed. We conclude that a DM based on our concept can be used for wavefront correction of space-borne telescopes, especially in the infrared wavelength region.

ホスト出版物のタイトルInfrared Remote Sensing and Instrumentation XXII
出版ステータスPublished - 2014
イベントInfrared Remote Sensing and Instrumentation XXII - San Diego, United States
継続期間: 2014 8月 18 → …


OtherInfrared Remote Sensing and Instrumentation XXII
国/地域United States
CitySan Diego
Period14/8/18 → …

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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