Removal of bias and the conjugate image in incoherent on-axis triangular holography and real-time reconstruction of the complex hologram

Abstract

We present and experimentally test a new passive-device incoherent holographic system that removes the bias and the conjugate image. The system is based on the triangular interferometer with the modification of insertion of simple passive devices and can easily be extended for obtaining real-time complex holograms without bias and conjugate images for moving objects. A scheme for real-time reconstruction of the complex hologram is also presented and experimentally tested.

Modified Lagrange invariants and their role in determining transverse and axial imaging resolutions of self-interference incoherent holographic systems

“…Second, in the hologram acquisition process, the wave from each object point is split into two waves which are mutually interfered on the hologram plane. Under these two conditions, several different holographic configurations belong to the family of systems violating the Lagrange invariant [3,[6][7][8][9][10][11][12][13][14][15][16][17][18]. We denote this group of systems, according to their common properties, as the family of self-informative-reference holographic (SIRH) systems.…”

Complex Fresnel hologram display using a single SLM

“…In the previous method, one uses two SLMs both in the AM mode to respectively display the real and the imaginary parts of the complex hologram and uses a beam splitter to combine the two holograms so that a complex hologram can be synthesized [25][26][27]. In the Subsection 2.B, we show a new method to display a complex hologram using a single SLM.…”

“…This can be implemented by cascading two SLMs, one for amplitude modulation (AM) and the other for phase modulation (PM) [22][23][24]. Alternatively, a beam splitter can be applied to combine the beams from two SLMs, one for displaying the real part and the other the imaginary part of the complex hologram [25][26][27].…”

Analysis of Effect of Phase Error Sources of Polarization Components in Incoherent Triangular Holography

“…By adjusting the relative phase between two optical waves using the linear polarizer and the wave plate, we can obtain the four intensities at the output plane as listed in Table 1: See [6,10] with respect to the above equations. By controlling four intensities either electronically or optically, we obtain the final complex hologram without bias:…”

“…Recently, Poon et al [ 5] proposed a technique that can simultaneously obtain sine and cosine Fresnel holograms to remove twin images. In previous work, we presented a new passive-device system [6], based on a triangular interferometer [2], that removes the bias and twin images using a phase-shifting technique [7,8]. However, the quality of the reconstructed image in incoherent triangular holography is also affected by the phase error in addition to the bias and the twin images of a complex hologram.…”