[1] S. Sullivan, M. Tilsch, and F. Van Milligen, Photonics Spectra, November issue, Laurin Publishing (2005) p. 86.

[2] R. Sargent, M. Tilsch, G. Ockenfuss, K. Hendrix, M. Grigonis, and A. Bergeron, in Proceedings of SVC 51st Annual Technical Conference O-1 (2008).

[3] M. K. Tilsch, R. B. Sargent, and C. A. Hulse, Wavelength Filters in Fibre Optics H. Venghaus (ed.) (Springer Series in Optical Sciences, 2006) chap.7.

[4] N. Boling, B. Wood, and P. Morand, in Proceedings of SVC 38th Annual Technical Conference 286 (1995).

[5] P. Sieck, in Proceedings of SVC 37th Annual Technical Conference 233 (1994).

[6] F. Gillery R. Criss, “Anode for magnetic sputtering apparatus” U.S. Patent 4,478,702 (1984).

[7] F. Gillery and R. Criss, “Anode for magnetic sputtering of gradient films” U.S. Patent 4,744,880 (1988).

[8] J. Seeser, P. LeFebvre, B. Hichwa, J. Lehan, S. Row lands, and T. Allen, in Proceedings of SVC 35th Annual Technical Conference, 229 (1992).

[9] M. Scobey, R. Seddon, J. Seeser, R. Austin, P. LeFebvre, and B. Manley, “Magnetron sputtering apparatus and process” U.S. Patent 4,851,095 (1988).

[10] G. J. Ockenfuss, M. K. Tilsch, and R. I. Seddon, in Proceedings of 6th ICCG 119 (2006).

[11] H. Jorke, “Device for projecting a color image” U.S. Patent 6,698,890 (2004).