Development of a dichroic beam splitter for Subaru AO188

Yosuke Minowa, Hideki Takami, Makoto Watanabe, Yutaka Hayano, Masaaki Miyake, Masanori Iye, Shin Oya, Masayuki Hattori, Naoshi Murakami, Olivier Guyon, Yoshihiko Saito, Meguru Itoh, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota

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

4 Citations (Scopus)

Abstract

We have developed a dichroic beam splitter for the Subaru AO188, which reflects optical light (0.4-0.9 μm) for wavefront sensing and transmits near-infrared light (0.93-5.2 μm) for science observations. The beam splitter is made of 145mm × 200mm calcium fluoride substrate coated by fluoride and metal chalcogen compound multilayer, which should be a best way to realize high transmittance over wide wavelength range in the near infrared. However, since typical fluoride soft coating is less resistant to the moisture in the air, the fluoride coating become damaged as we use on the AO188 optical bench which is placed in the room temperature condition. We have performed several accelerated endurance tests of the beam splitter under high-humidity condition by changing the design of the coatings, and found an optimal solution with an oxide protection layer which prevents the damage of the dichroic coating and keeps high transmittance at near-infrared wavelength. In this paper, we report the results of the endurance tests and the performance of our dichroic beam splitter.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7015
DOIs
StatePublished - 2008
Externally publishedYes
EventAdaptive Optics Systems - Marseille, France
Duration: Jun 23 2008Jun 26 2008

Other

OtherAdaptive Optics Systems
CountryFrance
CityMarseille
Period6/23/086/26/08

Fingerprint

Beam Splitter
beam splitters
Coating
Fluorides
fluorides
coatings
Coatings
Infrared
endurance
Transmittance
Infrared radiation
transmittance
Durability
Chalcogens
Calcium Fluoride
Wavelength
Calcium fluoride
Wavefront Sensing
calcium fluorides
metal compounds

Keywords

  • Adaptive optics
  • Beam splitter
  • Thin film coating

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Minowa, Y., Takami, H., Watanabe, M., Hayano, Y., Miyake, M., Iye, M., ... Golota, T. (2008). Development of a dichroic beam splitter for Subaru AO188. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7015). [701561] https://doi.org/10.1117/12.788597

Development of a dichroic beam splitter for Subaru AO188. / Minowa, Yosuke; Takami, Hideki; Watanabe, Makoto; Hayano, Yutaka; Miyake, Masaaki; Iye, Masanori; Oya, Shin; Hattori, Masayuki; Murakami, Naoshi; Guyon, Olivier; Saito, Yoshihiko; Itoh, Meguru; Colley, Stephen; Dinkins, Matthew; Eldred, Michael; Golota, Taras.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015 2008. 701561.

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

Minowa, Y, Takami, H, Watanabe, M, Hayano, Y, Miyake, M, Iye, M, Oya, S, Hattori, M, Murakami, N, Guyon, O, Saito, Y, Itoh, M, Colley, S, Dinkins, M, Eldred, M & Golota, T 2008, Development of a dichroic beam splitter for Subaru AO188. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7015, 701561, Adaptive Optics Systems, Marseille, France, 6/23/08. https://doi.org/10.1117/12.788597
Minowa Y, Takami H, Watanabe M, Hayano Y, Miyake M, Iye M et al. Development of a dichroic beam splitter for Subaru AO188. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015. 2008. 701561 https://doi.org/10.1117/12.788597
Minowa, Yosuke ; Takami, Hideki ; Watanabe, Makoto ; Hayano, Yutaka ; Miyake, Masaaki ; Iye, Masanori ; Oya, Shin ; Hattori, Masayuki ; Murakami, Naoshi ; Guyon, Olivier ; Saito, Yoshihiko ; Itoh, Meguru ; Colley, Stephen ; Dinkins, Matthew ; Eldred, Michael ; Golota, Taras. / Development of a dichroic beam splitter for Subaru AO188. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7015 2008.
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