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  1. Bell, R. J. 1972 Introductory Fourier Transform Spectroscopy (San Diego: Academic Press)
  2. Evans, J. W. 1958 The Solc birefringent filter J. Opt. Soc. Amer. 48 142
  3. Gale, M. T. 1998 In Optical document security, R. L. van Renesse ed. (Artech House) ch. 12
  4. Morris, H. R., Hoyt, C. C. and Treado, P. J. 1994 Imaging spectrometers for fluorescent and Raman microscopy: acousto-optic and liquid crystal tunable filters Applied Spectroscopy 48 857-866
  5. Title, A. M. and Rosenberg, W. J. 1981 Tunable birefringent filters Opt. Eng. 20 815-823
  6. Vaughan, J. M. 1989 The Fabry-Perot interferometer: history, theory, practice and applications (Bristol: Adam Hilger)