1. A confocal interference microscope;Hamilton;Optica Acta,1982
2. Surface profile measurement using the confocal microscope;Hamilton;J. Appl. Phys.,1982
3. Image formation in the scanning microscope;Sheppard;Optica Acta,1977
4. Sheppard , C.J.R. Hamilton , D.K. Mathews , H.J. 1988 Confocal interference microscopy Proc. Eur. Conf. Soc. Photo-Instru. Engrs, Hamburg, 21-23 Sept. 141