Spatial and temporal spectral analysis - Space and time holograms

As any optical system is a spatial filter, evidence of similar properties in the time domain have been demonstrated through simple but fundamental experiments (channelled spectra). Both spatial and time impulse responses and transfer functions can be determined through diffraction phenomena. The concept of Time Fourier Holograms is then derived from that of the power spectrum, and experimental justification becomes straightforward. Holography of extended self-luminous objects (white light) and metrological applications are presented as illustrations.