3.1 Introduction3.2 Depth Response of the Confocal Microscope with Infinitesimal Pinholes and Slits3.3 Depth Response of the Confocal Microscope with Finite-Sized Pinholes3.4 Transverse Response of the Confocal Microscope3.5 Depth and Transverse Resolution of the Interferometric Microscope3.6 The Near-Field Scanning Optical Microscope (NSOM)3.7 The Solid Immersion Microscope (SIM)3.8 Conclusion