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INFRARED MEASUREMENTS OF POSSIBLE IR FILTER MATERIALS

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Abstract

A Fourier Transform Infrared Spectrometer (FTS) was used to obtain the transmission spectra of candidate materials for use as infrared (IR) filters in cryogenic receivers. The data cover the range from 50 cm−1 (∼1.5 THz), well below the peak of the 300 K black body spectrum, to 5000 cm−1 (∼150 THz), Z-cut quartz, Goretex, Zitex G and Zitex A, High Density Polyethylene (HDPE), Teflon (PTFE), Fluorogold and Black Polyethylene were measured. The relative effectiveness of each material as a filter is determined by integrating the transmission spectrum multiplied by the Planck distribution to obtain a normalized attenuation for the mid-IR band. Measurements at both room temperature and 8 K are compared.

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References

  1. Currently manufactured by Advanced Research Systems, Inc., 905 Harrison Street, Allentown PA 18103. E-mail: ars@arseryo.com. The model used was similar to the LT-3.

  2. Daniel Koller, A. R. Kerr, G. a. Ediss, and D. Boyd, “Design and Fabrication of Quartz Vacuum Windows With Matching Layers for Millimeter-Wave Receivers,” ALMA Memo #377, June 2001, http://www.alma.nrao.edu/memos/

  3. James W. Lamb, “Miscellancous Data on Materials for Millimetere and Submillimetere Optics,” Int. J. of Infrared and Millimeter Waves, 17, no. 12, 1996.

  4. G. A. Ediss and D. Koller, “68.5 to 118 GHz Measurements of Possible Infrared Filter Materials: black polyethylene, Zitex, and grooved and ungrooved Fluorogold and HDPE,” ALMA Memo #412, March 2002. http://www.alma.nrao.edu/memos/

  5. Butyl-grafted polyethylene filled with carbon-black, catalog #ET331080. Goodfellow, Berwyn, PA 19312-1780. http://www.goodfellow.com

  6. W. L. Gore and Associates, Inc., 1901 Barksdale Rd., P. O. Box 9236, Newark, DE 19714-9236.

  7. Daniel Koller, G. A. Ediss and A. R. Kerr, “Dielectric Constant of Goretex RA7956/7957 Radome Material.” ALMA Memo #309, May 2000. http://www.alma.nrao.edu/memos/

  8. Manufactured by Norton Performance Plastics, 150 Dey Road, Wayne, NJ.

  9. Jeffrey S. Clarke and Larry R. D’Addario, “Tests of Materials for Use in Multi-Layer Infrared Filters in Cryogenic Applications,” ALMA Memo #269, July 1999. http://www.alma.nrao.edu/memos/

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Authors and Affiliations

  1. National Radio Astronomy Observatory, 1180 Boxwood Estate Road, Charlottesville, VA, 22903, USA

    Daniel Koller & G. A. Ediss

  2. Department of Physics, State University of New York, Stony Brook, NY, 11794, USA

    Laszlo Mihaly

  3. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY, 11973, USA

    G. L. Carr

Authors
  1. Daniel Koller
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  2. G. A. Ediss
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  3. Laszlo Mihaly
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  4. G. L. Carr
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Koller, D., Ediss, G.A., Mihaly, L. et al. INFRARED MEASUREMENTS OF POSSIBLE IR FILTER MATERIALS. Int J Infrared Milli Waves 27, 835–846 (2006). https://doi.org/10.1007/s10762-006-9121-8

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  • DOI: https://doi.org/10.1007/s10762-006-9121-8

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