- Incoherent self-interference digital holography can be used for several applications, among which are high resolution fluorescence microscopy and imaging through a scattering medium. Systems in which both interfering beams originate from the same observed objects are considered as self-interference hologram recorders. Furthermore, the hologram recorders reviewed in this presentation are configured in a setup of a single channel optical system. In this presentation we describe the evolution of a well-known method of incoherent digital holography, the Fresnel incoherent correlation holography (FINCH). Following the review of FINCH, other recently developed self-reference single-channel incoherent hologram recorders, branched out from FINCH, are discussed and several biomedical- related applications are described.