[1] [1] S. Okuda, T. Nomura, K. Kamiya, H. Miyashiro, K. Yoshikawa, and H. Tashiro, Appl. Opt. 39, 5179 (2000).

[2] [2] X. Tian, M. Itoh, and T. Yatagai, Appl. Opt. 34, 7213 (1995).

[3] [3] G. Harbers, P. J. Kunst, and G. W. R. Leibbrandt, Appl. Opt. 35, 6162 (1996).

[4] [4] H. Brug, Appl. Opt. 36, 2788 (1997).

[5] [5] C. Elster and I. Weing¨artner, Appl. Opt. 38, 5024 (1999).

[6] [6] A. Dubra, C. Paterson, and C. Dainty, Appl. Opt. 43, 1108 (2004).

[7] [7] R. H. Hudgin, J. Opt. Soc. Am. 67, 375 (1977).

[8] [8] B. R. Hunt, J. Opt. Soc. Am. 69, 393 (1979).

[9] [9] W. H. Southwell, J. Opt. Soc. Am. 70, 998 (1980).

[10] [10] J. Herrmann, J. Opt. Soc. Am. 70, 28 (1980).

[11] [11] H. Takajo and T. Takahashi, J. Opt. Soc. Am. 5, 416 (1988).

[12] [12] D. C. Ghiglia and L. A. Romero, Opt. Lett. 14, 1107 (1989).

[13] [13] P. Liang, J. Ding, Z. Jin, C. Guo, and H. Wang, Opt. Express 14, 625 (2006).

[14] [14] M. Bray, Proc. SPIE 3134, 39 (1997).

[15] [15] P. Murphy, J. Fleig, and G. Forbes, Proc. SPIE 6293, 62930J1 (2006).

[16] [16] E. E. Bloemhof, Opt. Lett. 35, 2346 (2010).