Abstract
We report on UV/Visible transmission measurements of aluminum coated Lexan filters designed as UV blocking filters for soft x-ray detectors. Transmission of the filters in the 2300-8000 Å wavelength range is significantly higher than expected. It cannot be accounted for applying a simple slab model of the transmission and adopting material properties reported in the literature. We show that this is due to interference effects which are strongly dependent on the filter geometry, and to oxidation of exposed aluminum surfaces and/or chemical interaction with the plastic support. The results of this work have led to the redesign of the Advanced X-ray Astrophysics Facility High Resolution Camera UV blocking filters.
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References
Altman, R.M., 1995, in “Designing Plastic Optics: New Applications Emerging for Optical Glass Substitutes”, C. Tribastone, C. Teyssier, and W. Peck, OPKOR, Inc., The Photonics Design & Applications Handbook, Laurin Publishing Co., Inc., Pittsfield, MA.
Barbera, M., Collura, A., Dara, A., 1995, OAPA internal report, document number OAPA-R3-1995.
Barbera, M., Collura, A., Dara, A., 1996, SPIE Proc., Vol. 2808 in press.
Barstow, 1985, University of Leicester internal report.
Born and Wolf, 1984, “Principles of Optics”, Pergamon Press.
Bowyer, S., et al., 1992, Bull. American Astron, Soc., 181,--23.02
Collura, A., Barbera, M., Inzerillo, G., Mirabello, F., Sciortino, S., Serio, S., 1994, SPIE Proc., Vol. 2280, p. 206.
Collura, A., Barbera, A. Dara, M., Inzerillo, G., Mirabello, F., Sciortino, S., Serio, S., 1996, SPIE Proc., Vol. 2808, in press.
Fabricant, D.G., et al., 1979, Rev. Sci. Inst., 50, 727.
Heavens, O.S., 1991, “Optical Properties of Thin Films”, Dover Publications, New York
Hagemann, Gudet, and Kunz. 1974, DESY report SR-74/7.
Malina, R. F., et al., 1992, Bull. American Astron. Soc., 181, 23.01
Murray, S.S., and Chappel, J.II., 1985, SPIE Proc., Vol. 597, p. 274.
Smith, D.Y., Shiles, E., and Mitio Inokuti, in “Handbook of optical constants of solids”, p. 369–406, Ed. Palik, E.D., Academic. Press, Inc.
Taylor, B., Andresen, R., Peacock, A., Zobl, R., 1981, Space Sci. Rev., Vol. 30, p. 479.
Truemper, J., 1983, Adv. Space Res. 2,N. 4, p. 241.
Vallerga, J., Siegmund, O.H.W., Everman, E., and Jelinsky, P., 1986, Proc. SPIE, Vol. 689, p. 138.
Weisskopf, M., 1985, Proc. SPIE, Vol. 597, p. 228.
Weisskopf, M., 1996, Proc. SPIE, Vol. 2808, in press.
Zombeck, M.V., David. L.P., Harnden, F.R., Jr., and Kearns, K., 1995, SPIE Proc., Vol. 2518, p. 304.
Zombeck, M.V., et al., 1996, in preparation.
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Barbera, M., Collura, A., Dara, A. et al. Effects of Interference and Oxidation on the UV/Visible Rejection Properties of Filters for Soft X-ray Detectors. Experimental Astronomy 7, 51–63 (1997). https://doi.org/10.1023/A:1007919005280
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DOI: https://doi.org/10.1023/A:1007919005280