Three-dimensional (3D) Dammann confocal microscopy is proposed based on introducing 3D Dammann gratings into
traditional confocal microscopy. The conventional confocal microscopy usually has a single focal point. Using threedimensional
Dammann gratings, it shows a new confocal microscopy which could obtain three-dimensional information
of object, therefore, novel Dammann-based microscopy should be developed for practical applications.