[1] D. Xu, High Density Optical Data Storage (Tsinghua University Press, Beijing, 2002).
[2] W. G. Driscoll and W. Vaughan, (eds.) Handbook of Optics (McGraw Hill, New York, 2001).
[3] J. M. Geary, Introduction to Lens Design with Practical ZEMAX Examples (Willmann-Bell Inc., Richmond, 2002).
[4] ZEMAX Optical Design Program User's Guide (2003).
