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Applied Optics

Applied Optics


  • Vol. 34, Iss. 31 — Nov. 1, 1995
  • pp: 7254–7257

Performance of a low-pass filter for far-infrared wavelengths

J. J. Bock and A. E. Lange  »View Author Affiliations

Applied Optics, Vol. 34, Issue 31, pp. 7254-7257 (1995)

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We describe a low-pass filter that provides high in-band transmittance and excellent rejection at ν > 100 cm−1. The transmittance of the filter components was measured at liquid-helium temperatures from 10 to 10,000 cm−1. The total transmittance is >50% for ν < 50 cm−1 and is calculated to be <10−9 for ν > 300 cm−1. The filter was successfully used in a liquid-helium-cooled, rocketborne, far-infrared absolute photometer.

© 1995 Optical Society of America

Original Manuscript: April 18, 1995
Revised Manuscript: July 20, 1995
Published: November 1, 1995

J. J. Bock and A. E. Lange, "Performance of a low-pass filter for far-infrared wavelengths," Appl. Opt. 34, 7254-7257 (1995)

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