Doubling the acquisition rate by spatial multiplexing of holograms in coherent sparse coded aperture correlation holography

Hai, Nathaniel; Rosen, Joseph

doi:10.1364/ol.394475

Cited by 20 publications

(15 citation statements)

References 18 publications

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“…Recently, our group found a certain type of PSHs with the superiority in terms of the image quality and of the apparatus robustness [19][20][21]. These PSHs are made of a group of isolated light dots distributed chaotically over the entire image plane of the system.…”

Section: Coherently Illuminated Coachmentioning

confidence: 99%

“…By designing the impulse response of the system as randomly and sparsely distributed light dots, we not only could treat the given coherent system as an incoherent and analyze it as such, but we also earn inherent optimization parameters to enhance the quality of reconstructed images. An advanced coherent COACH with the ability to multiplex more than one hologram per one camera shot has been proposed recently in [20].…”

Section: Introductionmentioning

confidence: 99%

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Coded aperture correlation holographic microscope for single-shot quantitative phase and amplitude imaging with extended field of view

Hai¹,

Rosen²

2020

Opt. Express

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Recently, a method of recording holograms of coherently illuminated threedimensional scene without two-wave interference was demonstrated. The method is an extension of the coded aperture correlation holography from incoherent to coherent illumination. Although this method is practical for some tasks, it is not capable of imaging phase objects, a capability that is an important benefit of coherent holography. The present work addresses this limitation by using the same type of coded phase masks in a modified Mach-Zehnder interferometer. We show that by several comparative parameters, the coded aperturebased phase imaging is superior to the equivalent open aperture-based method. As an additional merit of the coded aperture approach, a framework for increasing the system's field of view is formulated and demonstrated for both amplitude and phase objects. The combination of high sensitivity quantitative phase microscope with increased field of view in a single camera shot holographic apparatus, has immense potential to serve as the preferred tool for examination of biological tissues and micro-organisms.

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Section: Coherently Illuminated Coachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coded aperture correlation holographic microscope for single-shot quantitative phase and amplitude imaging with extended field of view

Hai¹,

Rosen²

2020

Opt. Express

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“…Consequently, the coherent holograms are empowered with an additional quantitative phase measurement capability. In this case, COACH is integrated with a standard Mach-Zehnder interferometer to record the phase distribution of the observed objects [15][16][17]. Specifically, it records off-axis hologram and removes twin image and the bias term in the spatial frequency spectrum.…”

Section: Introductionmentioning

confidence: 99%

Full-Dimensional Surface Characterization Based on Polarized Coherent Coded Aperture Correlation Holography

Xiong

Zhang

et al. 2022

IEEE Photonics J.

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The coded aperture correlation holography (COACH) is a powerful three-dimensional imaging technique. However, the conventional COACH method can only restore the three-dimensional images of the samples under test, but cannot specify the physical characteristics. We propose a full-dimensional measurement method based on the polarized coded aperture correlation holography. Specifically, the dynamic phase and geometric phase distributions can be separated from two holograms associated with the horizontal and vertical polarization components, then the Stokes parameters, surface topography and reflectivity can be calculated simultaneously. This method achieves the same spatial resolution for the two terms, which greatly improves the reliability and practicability with respect to conventional measurement methods.

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“…The resulting interferogram is processed to extract the phase distribution of the object. Multimodal imaging methods involving the measurement of both amplitude and phase have been developed, but require a dual beam approach [ 15 , 16 ], coded aperture methods [ 17 , 18 ], Lloyd’s mirror [ 19 ] and low-coherence two beam holography techniques [ 20 ]. In all the above techniques, many optical components such as lenses, prisms, beam splitters, polarizers, etc., are needed for beam splitting, combining and for creation of interference patterns.…”

Section: Introductionmentioning

confidence: 99%

Lensless Three-Dimensional Quantitative Phase Imaging Using Phase Retrieval Algorithm

et al. 2020

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Quantitative phase imaging (QPI) techniques are widely used for the label-free examining of transparent biological samples. QPI techniques can be broadly classified into interference-based and interferenceless methods. The interferometric methods which record the complex amplitude are usually bulky with many optical components and use coherent illumination. The interferenceless approaches which need only the intensity distribution and works using phase retrieval algorithms have gained attention as they require lesser resources, cost, space and can work with incoherent illumination. With rapid developments in computational optical techniques and deep learning, QPI has reached new levels of applications. In this tutorial, we discuss one of the basic optical configurations of a lensless QPI technique based on the phase-retrieval algorithm. Simulative studies on QPI of thin, thick, and greyscale phase objects with assistive pseudo-codes and computational codes in Octave is provided. Binary phase samples with positive and negative resist profiles were fabricated using lithography, and a single plane and two plane phase objects were constructed. Light diffracted from a point object is modulated by phase samples and the corresponding intensity patterns are recorded. The phase retrieval approach is applied for 2D and 3D phase reconstructions. Commented codes in Octave for image acquisition and automation using a web camera in an open source operating system are provided.

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Doubling the acquisition rate by spatial multiplexing of holograms in coherent sparse coded aperture correlation holography

Cited by 20 publications

References 18 publications

Coded aperture correlation holographic microscope for single-shot quantitative phase and amplitude imaging with extended field of view

Coded aperture correlation holographic microscope for single-shot quantitative phase and amplitude imaging with extended field of view

Full-Dimensional Surface Characterization Based on Polarized Coherent Coded Aperture Correlation Holography

Lensless Three-Dimensional Quantitative Phase Imaging Using Phase Retrieval Algorithm

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