A general study of the design of lenses of double Gauss type and derivatives of these has been carried out, with the lenses optimized at an aperture of ƒ/2 and a field angle of ±20°. The results indicate that the number of optimized designs is small for all of the constructions that were investigated. Numerical examplesfor several designs are given.
M. J. Kidger and C. G. Wynne, "The Design of Double Gauss Systems Using Digital Computers," Appl. Opt. 6, 553-563 (1967)