Digital spatially incoherent Fresnel holography

Abstract

We present a new method for recording digital holograms under incoherent illumination. Light is reflected from a 3D object, propagates through a diffractive optical element (DOE), and is recorded by a digital camera. Three holograms are recorded sequentially, each for a different phase factor of the DOE. The three holograms are superposed in the computer, such that the result is a complex-valued Fresnel hologram. When this hologram is reconstructed in the computer, the 3D properties of the object are revealed.

Review of three-dimensional holographic imaging by Fresnel incoherent correlation holograms

“…This review concentrates on the technique of incoherent digital holography based on single-channel incoherent interferometers, which we have been involved in their development recently [16][17][18][19] . The type of hologram discussed here is the digital Fresnel hologram, which means that a hologram of a single point has the form of the well-known FZP.…”

“…The discussed incoherent digital hologram is dubbed Fresnel incoherent correlation hologram (FINCH) [16][17][18] . The FINCH is actually based on a single channel onaxis incoherent interferometer.…”

“…Various aspects of the FINCH have been described in Refs. [16][17][18][19], including FINCH of reflected white light 16 , FINCH of fluorescence objects 17 , a FINCH-based holographic fluorescence microscope 18 and finally a hologram recorder in a mode of a synthetic aperture 19 . We briefly review these works in the current section.…”

“…Besides a constant term, the hologram expression contains two terms of correlation between an object and a quadratic phase, Z-dependent, function. In order to remain with a single correlation term out of the three terms, we follow the usual procedure of on-axis digital holography 14,[16][17][18][19] . Three holograms of the same object are recorded each of which with a different phase constant.…”

Multispectral hyperbolic incoherent holography

“…Various types of techniques have proposed. One technique is based on diffraction theory which can be implemented by making use of spatial light modulator [3][4][5] or concave mirror [6] and other technique uses radial shearing [7] or rotational shearing [8] interferometric systems.…”