Microscope adapted for the generation of various contrast types: theory and experiment.

@article{Lang1977MicroscopeAF,
  title={Microscope adapted for the generation of various contrast types: theory and experiment.},
  author={H de Lang and N. H. Dekkers},
  journal={Applied optics},
  year={1977},
  volume={16 8},
  pages={
          2215-22
        }
}
With the aid of a polarizer, an analyzer, and two birefringent double plates placed in conjugate positions at the front focal plane of the condenser and the rear focal plane of the objective, respectively, a microscope is adapted to generate in a pure form one of four contrast types, i.e., either phase or amplitude differential or nondifferential. The theory of such an arrangement is discussed, and some practical results are shown.