Confocal scanning optical microscope using single-mode fiber for signal detection

Appl Opt. 1991 Jun 1;30(16):2143-50. doi: 10.1364/AO.30.002143.


A single-mode fiber is employed as a detector in a confocal scanning optical microscope (CSOM) instead of a pinhole and its optical property is studied. The optical system is always coherent, which is fundamentally different from the CSOM with a finite-sized pinhole. The coherent transfer function and the axial response are calculated. Experimentally, the coherent image is taken and the axial response is also measured.