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Large Volume (20L+) Filtration of Coastal Seawater Samples

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Solid organic filters for 2000 A to 3000 A.

S F Pellicori¹, C A Johnson, F T King

¹University of Arizona, Lunar and Planetary Laboratory, Tucson, Arizona, USA.

|January 9, 2010

Summary

This summary is machine-generated.

New solid-state filters offer narrow bandpass transmittance for space missions. These organic filters, using polymethyl siloxane resin, are tested for UV applications.

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Area of Science:

Optics and Photonics
Materials Science
Space Instrumentation

Background:

Previous research focused on organic, narrow bandpass solution filters.
The need for robust filters for extraterrestrial applications is growing.

Purpose of the Study:

To develop solid-state narrow bandpass filters for UV applications.
To evaluate the suitability of polymethyl siloxane resin as a host material for these filters.
To characterize the performance and environmental stability of fabricated filters.

Main Methods:

Fabrication of solid filters using polymethyl siloxane resin.
Characterization of transmission filters with maxima at 2250 A, 2265 A, and 2840 A.
Measurement of bandwidths (<= 225 A).
Recording of transmittance and spectral response curves with Cesium Telluride (CsTe) photocathodes.
Conducting environmental tests.

Main Results:

Successfully fabricated three solid-state transmission filters with narrow bandpasses.
Filters exhibit transmittance maxima at 2250 A, 2265 A, and 2840 A.
Bandwidths were measured to be less than or equal to 225 A.
Environmental tests indicate suitability for space and balloon missions.

Conclusions:

Polymethyl siloxane resin is a viable host material for fabricating space-qualified narrow bandpass filters.
The developed filters demonstrate excellent performance for UV applications.
These filters are well-suited for deployment in balloon and space missions.