Abstract
Developments of incoherent digital holography (IDH) with daily-use light are presented, and its prospective
applications are discussed. Optical systems of IDH have become extremely compact, and the applications
of IDH have been extended to various imaging techniques and apparatus. A theory of IDH for
spatially and temporally incoherent light has been confirmed by various research studies. Directions of
the developments and applications of IDH are discussed on the basis of research achievements.