Silver coating of the 1.3 m infrared secondary mirror of Subaru.

Details Silver coating of the 1.3 m infrared secondary mirror of Subaru. Silver coating of the 1.3 m infrared secondary mirror of Subaru.

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999rnaoj...4..139k&link_type=abstract

Rep. Natl. Astron. Obs. Jpn., Vol. 4, No. 3, p. 139 - 144

Astronomy and Astrophysics

Astronomy

Mirrors: Coatings

Scientific paper

The authors report the silver coating of 1266 mm secondary mirror to be used for infrared observations at Subaru Telescope. Silver was deposited over the chromium bondage layer, using a 1.6-m vacuum coating chamber at the Advanced Technology Center of the National Astronomical Observatory of Japan. The witness mirrors coated at the same time with this mirror show the characteristics as follows: 1) Total thickness of the chromium plus silver film is 1300±100 Å. 2) Reflectivity is 98±1% over the wide range of visible wavelength to the near infrared wavelength.

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