51
|
Fast Method of Recovering Reference-Wave Intensity in Two-Step-Only Quadrature Phase-Shifting Holography. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7101084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
52
|
Horisaki R, Kojima T, Matsushima K, Tanida J. Subpixel reconstruction for single-shot phase imaging with coded diffraction. APPLIED OPTICS 2017; 56:7642-7647. [PMID: 29047743 DOI: 10.1364/ao.56.007642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
We present an algorithm for reconstructing an object complex field with resolution below that of an image sensor (subpixel resolution) in single-shot diffractive imaging with coded diffraction. The algorithm employs subpixel phase retrieval and sparse regularization based on compressive sensing. This is useful for high-speed or high-sensitivity imaging using an image sensor with a low pixel count and/or a large pixel size. We experimentally demonstrated the proposed method with two types of moving objects.
Collapse
|
53
|
Kumar M, Vijayakumar A, Rosen J. Incoherent digital holograms acquired by interferenceless coded aperture correlation holography system without refractive lenses. Sci Rep 2017; 7:11555. [PMID: 28912489 PMCID: PMC5599627 DOI: 10.1038/s41598-017-11731-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 08/29/2017] [Indexed: 11/09/2022] Open
Abstract
We present a lensless, interferenceless incoherent digital holography technique based on the principle of coded aperture correlation holography. The acquired digital hologram by this technique contains a three-dimensional image of some observed scene. Light diffracted by a point object (pinhole) is modulated using a random-like coded phase mask (CPM) and the intensity pattern is recorded and composed as a point spread hologram (PSH). A library of PSHs is created using the same CPM by moving the pinhole to all possible axial locations. Intensity diffracted through the same CPM from an object placed within the axial limits of the PSH library is recorded by a digital camera. The recorded intensity this time is composed as the object hologram. The image of the object at any axial plane is reconstructed by cross-correlating the object hologram with the corresponding component of the PSH library. The reconstruction noise attached to the image is suppressed by various methods. The reconstruction results of multiplane and thick objects by this technique are compared with regular lens-based imaging.
Collapse
Affiliation(s)
- Manoj Kumar
- Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 8410501, Israel.
| | - A Vijayakumar
- Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 8410501, Israel
| | - Joseph Rosen
- Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 8410501, Israel
| |
Collapse
|
54
|
Singh AK, Pedrini G, Takeda M, Osten W. Scatter-plate microscope for lensless microscopy with diffraction limited resolution. Sci Rep 2017; 7:10687. [PMID: 28878361 PMCID: PMC5587816 DOI: 10.1038/s41598-017-10767-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/14/2017] [Indexed: 11/22/2022] Open
Abstract
Scattering media have always been looked upon as an obstacle in imaging. Various methods, ranging from holography to phase compensation as well as to correlation techniques, have been proposed to cope with this obstacle. We, on the other hand, have a different understanding about the role of the diffusing media. In this paper we propose and demonstrate a ‘scatter-plate microscope’ that utilizes the diffusing property of the random medium for imaging micro structures with diffraction-limited resolution. The ubiquitous property of the speckle patterns permits to exploit the scattering medium as an ultra-thin lensless microscope objective with a variable focal length and a large working distance. The method provides a light, flexible and cost effective imaging device as an alternative to conventional microscope objectives. In principle, the technique is also applicable to lensless imaging in UV and X-ray microscopy. Experiments were performed with visible light to demonstrate the microscopic imaging of USAF resolution test target and a biological sample with varying numerical aperture (NA) and magnifications.
Collapse
Affiliation(s)
- Alok Kumar Singh
- Institut für Technische Optik and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569, Stuttgart, Germany.
| | - Giancarlo Pedrini
- Institut für Technische Optik and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569, Stuttgart, Germany
| | - Mitsuo Takeda
- Institut für Technische Optik and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569, Stuttgart, Germany.,Center for Optical Research and Education (CORE), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi, 321-8585, Japan
| | - Wolfgang Osten
- Institut für Technische Optik and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569, Stuttgart, Germany
| |
Collapse
|
55
|
Han L, Cheng ZJ, Yang Y, Wang BY, Yue QY, Guo CS. Double-channel angular-multiplexing polarization holography with common-path and off-axis configuration. OPTICS EXPRESS 2017; 25:21877-21886. [PMID: 29041479 DOI: 10.1364/oe.25.021877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 08/21/2017] [Indexed: 06/07/2023]
Abstract
We propose a double-channel angular-multiplexing polarization holographic imaging system with common-path and off-axis configurations. In the system, its input plane is spatially divided into three windows: an object window and two reference windows, and two orthogonal linear polarizers are attached, respectively, on the two reference windows; a two-dimensional cross grating is inserted between the input and output planes of the system. Thus the object beam passing through the object window and the two orthogonal polarized reference beams passing through the two reference windows can overlap each other at the output plane of the system and form a double-channel angular-multiplexing polarization hologram (DC-AM-PH). Using this system, the complex amplitude distributions of two orthogonal polarized components from an object can be recorded and reconstructed by one single-shot DC-AM-PH at the same time. Theoretical analysis and experimental results demonstrated that the system can be used to measure the Jones matrix parameters of polarization-sensitive or birefringent materials.
Collapse
|
56
|
Opposite-view digital holographic microscopy with autofocusing capability. Sci Rep 2017; 7:4255. [PMID: 28652591 PMCID: PMC5484697 DOI: 10.1038/s41598-017-04568-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 05/16/2017] [Indexed: 11/08/2022] Open
Abstract
Digital holographic microscopy (DHM) has its intrinsic ability to refocusing a sample by numerically propagating an object wave from its hologram plane to its image plane. In this paper opposite-view digital holographic microscopy (OV-DHM) is demonstrated for autofocusing, namely, digitally determining the location of the image plane, and refocusing the object wave without human intervention. In OV-DHM, a specimen is illuminated from two sides in a 4π-alike configuration, and two holograms are generated and recorded by a CCD camera along two orthogonal polarization orientations. The image plane of the sample is determined by finding the minimal variation between the two object waves, and consequently refocusing is performed by propagating the waves to the image plane. Furthermore, the field of view (FOV) of OV-DHM can be extended by combining the two object waves which have an angle in-between. The proposed technique also has the potential to reduce speckle noise and out-of-focus background.
Collapse
|
57
|
Lysenko S, Sterligov V, Gonçalves M, Rúa A, Gritsayenko I, Fernández F. Super-resolution in diffractive imaging from hemispherical elastic light scattering data. OPTICS LETTERS 2017; 42:2263-2266. [PMID: 28614327 DOI: 10.1364/ol.42.002263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
Angle-resolved hemispherical elastic light scattering techniques have been used to reconstruct the surface profile of two-dimensional photonic crystals with submicron resolution and metrological precision. Iterative algorithms permit subsequent calculation of a surface autocorrelation function with additional numerical approximation of the power spectrum and then yield final reconstruction of the surface shape. The proposed method enables filtering out unwanted scattering background, precluding the convergence of phase-retrieval algorithms. The estimation of higher harmonics in the power spectrum provides the reconstruction of a realistic surface achieving subwavelength resolution.
Collapse
|
58
|
Complex beam shaping based on an equivalent q-plate system and analysis of its properties using digital holography polarization imaging. Sci Rep 2017; 7:2769. [PMID: 28584259 PMCID: PMC5459860 DOI: 10.1038/s41598-017-02973-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 04/20/2017] [Indexed: 11/10/2022] Open
Abstract
In this study, we generate various complex beams carrying angular momentum (AM) by using a programmable beam shaping system to mimic typical q-plates. When a circularly polarized wave is incident onto the system, the emerging beam reverses its spin handedness and obtains a spatial phase factor. This phase factor can be engineered by designing a computer-generated hologram (CGH) and applying it to a spatial light modulator (SLM) to produce a beam with controllable spatially distributed orbital angular momentum (OAM) density. To determine the properties of the generated fields, we combine digital holography (DH) with the beam shaping system to yield visualizations of the beam intensity, phase, and AM distributions over the transverse plane at different propagation distances. Comparisons of the theoretically and experimentally obtained results show good qualitative agreement. This study advances our understanding and interpretation of AM characteristics produced by a programmable q-plate-like system.
Collapse
|
59
|
Dannhauser D, Rossi D, Memmolo P, Causa F, Finizio A, Ferraro P, Netti PA. Label-free analysis of mononuclear human blood cells in microfluidic flow by coherent imaging tools. JOURNAL OF BIOPHOTONICS 2017; 10:683-689. [PMID: 27503536 DOI: 10.1002/jbio.201600070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/31/2016] [Accepted: 07/11/2016] [Indexed: 05/24/2023]
Abstract
The investigation of the physical properties of peripheral blood mononuclear cells (PBMC) is of great relevance, as they play a key role in regulating human body health. Here we report the possibility to characterize human PBMC in their physiological conditions in a microfluidic-based measurement system. A viscoelastic polymer solution is adopted for 3D alignment of individual cells inflow. An optical signature (OS) acquisition of each flowing cell is performed using a wide angle light scattering apparatus. Besides, a quantitative phase imaging (QPI) holographic system is employed with the aim (i) to check the position in flow of individual cells using a holographic 3D cell tracking method; and (ii) to estimate their 3D morphometric features, such as their refractive index (RI). Results obtained by combining OS and QPI have been compared with literature values, showing good agreement. The results confirm the possibility to obtain sub-micrometric details of physical cell properties in microfluidic flow, avoiding chemical staining or fluorescent labelling.
Collapse
Affiliation(s)
- David Dannhauser
- Center for Advanced Biomaterials for Healthcare@CRIB, Istituto Italiano di Tecnologia (IIT), Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Domenico Rossi
- Center for Advanced Biomaterials for Healthcare@CRIB, Istituto Italiano di Tecnologia (IIT), Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Pasquale Memmolo
- CNR-ISASI Institute of Applied Sciences & Intelligent Systems "E. Caianiello", Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Filippo Causa
- Interdisciplinary Research Centre on Biomaterials (CRIB), Università degli Studi di Napoli "Federico II", Piazzale Tecchio 80, 80125, Naples, Italy
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), Università degli Studi di Napoli "Federico II", Piazzale Tecchio 80, 80125, Naples, Italy
| | - Andrea Finizio
- CNR-ISASI Institute of Applied Sciences & Intelligent Systems "E. Caianiello", Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Pietro Ferraro
- CNR-ISASI Institute of Applied Sciences & Intelligent Systems "E. Caianiello", Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Paolo A Netti
- Center for Advanced Biomaterials for Healthcare@CRIB, Istituto Italiano di Tecnologia (IIT), Largo Barsanti e Matteucci 53, 80125, Naples, Italy
- Interdisciplinary Research Centre on Biomaterials (CRIB), Università degli Studi di Napoli "Federico II", Piazzale Tecchio 80, 80125, Naples, Italy
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), Università degli Studi di Napoli "Federico II", Piazzale Tecchio 80, 80125, Naples, Italy
| |
Collapse
|
60
|
Rawat S, Komatsu S, Markman A, Anand A, Javidi B. Compact and field-portable 3D printed shearing digital holographic microscope for automated cell identification. APPLIED OPTICS 2017; 56:D127-D133. [PMID: 28375380 DOI: 10.1364/ao.56.00d127] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We propose a low-cost, compact, and field-portable 3D printed holographic microscope for automated cell identification based on a common path shearing interferometer setup. Once a hologram is captured from the portable setup, a 3D reconstructed height profile of the cell is created. We extract several morphological cell features from the reconstructed 3D height profiles, including mean physical cell thickness, coefficient of variation, optical volume (OV) of the cell, projected area of the cell (PA), ratio of PA to OV, cell thickness kurtosis, cell thickness skewness, and the dry mass of the cell for identification using the random forest (RF) classifier. The 3D printed prototype can serve as a low-cost alternative for the developing world, where access to laboratory facilities for disease diagnosis are limited. Additionally, a cell phone sensor is used to capture the digital holograms. This enables the user to send the acquired holograms over the internet to a computational device located remotely for cellular identification and classification (analysis). The 3D printed system presented in this paper can be used as a low-cost, stable, and field-portable digital holographic microscope as well as an automated cell identification system. To the best of our knowledge, this is the first research paper presenting automatic cell identification using a low-cost 3D printed digital holographic microscopy setup based on common path shearing interferometry.
Collapse
|
61
|
Aakhte M, Abbasian V, Akhlaghi EA, Moradi AR, Anand A, Javidi B. Microsphere-assisted super-resolved Mirau digital holographic microscopy for cell identification. APPLIED OPTICS 2017; 56:D8-D13. [PMID: 28375382 DOI: 10.1364/ao.56.0000d8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this paper, we use a glass microsphere incorporated into a digital holographic microscope to increase the effective resolution of the system, aiming at precise cell identification. A Mirau interferometric objective is employed in the experiments, which can be used for a common-path digital holographic microscopy (DHMicroscopy) arrangement. High-magnification Mirau objectives are expensive and suffer from low working distances, yet the commonly used low-magnification Mirau objectives do not have high lateral resolutions. We show that by placing a glass microsphere within the working distance of a low-magnification Mirau objective, its effective numerical aperture can be increased, leading to super-resolved three-dimensional images. The improvement in the lateral resolution depends on the size and vertical position of microsphere, and by varying these parameters, the lateral resolution and magnification may be adjusted. We used the information from the super-resolution DHMicroscopy to identify thalassemia minor red blood cells (tRBCs). Identification is done by comparing the volumetric measurements with those of healthy RBCs. Our results show that microsphere-assisted super-resolved Mirau DHMicroscopy, being common path and off-axis in nature, has the potential to serve as a benchtop device for cell identification and biomedical measurements.
Collapse
|
62
|
Singh AK, Naik DN, Pedrini G, Takeda M, Osten W. Exploiting scattering media for exploring 3D objects. LIGHT, SCIENCE & APPLICATIONS 2017; 6:e16219. [PMID: 30167232 PMCID: PMC6062180 DOI: 10.1038/lsa.2016.219] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 08/22/2016] [Accepted: 09/04/2016] [Indexed: 05/20/2023]
Abstract
Scattering media, such as diffused glass and biological tissue, are usually treated as obstacles in imaging. To cope with the random phase introduced by a turbid medium, most existing imaging techniques recourse to either phase compensation by optical means or phase recovery using iterative algorithms, and their applications are often limited to two-dimensional imaging. In contrast, we utilize the scattering medium as an unconventional imaging lens and exploit its lens-like properties for lensless three-dimensional (3D) imaging with diffraction-limited resolution. Our spatially incoherent lensless imaging technique is simple and capable of variable focusing with adjustable depths of focus that enables depth sensing of 3D objects that are concealed by the diffusing medium. Wide-field imaging with diffraction-limited resolution is verified experimentally by a single-shot recording of the 1951 USAF resolution test chart, and 3D imaging and depth sensing are demonstrated by shifting focus over axially separated objects.
Collapse
Affiliation(s)
- Alok Kumar Singh
- Institut für Technische Optik (ITO) and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
| | - Dinesh N Naik
- Institut für Technische Optik (ITO) and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
- School of Physics, University of Hyderabad, Hyderabad 500 046, India
| | - Giancarlo Pedrini
- Institut für Technische Optik (ITO) and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
| | - Mitsuo Takeda
- Institut für Technische Optik (ITO) and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
- Center for Optical Research and Education (CORE), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi, 321- 8585, Japan
| | - Wolfgang Osten
- Institut für Technische Optik (ITO) and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
| |
Collapse
|
63
|
Memmolo P, Merola F, Miccio L, Mugnano M, Ferraro P. Investigation on dynamics of red blood cells through their behavior as biophotonic lenses. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:121509. [PMID: 27735017 DOI: 10.1117/1.jbo.21.12.121509] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 09/19/2016] [Indexed: 05/24/2023]
Abstract
The possibility to adopt biological matter as photonic optical elements can open scenarios in biophotonics research. Recently, it has been demonstrated that a red blood cell (RBC) can be seen as an optofluidic microlens by showing its imaging capability as well as its focal tunability. Moreover, correlation between an RBC’s morphology and its behavior as a refractive optical element has been established and its exploitation for biomedical diagnostic purposes has been foreseen. In fact, any deviation from the healthy RBC morphology can be seen as additional aberration in the optical wavefront passing through the cell. By this concept, accurate localization of focal spots of RBCs can become very useful in the blood disorders identification. We investigate the three-dimensional positioning of such focal spots over time for samples with two different osmolarity conditions, i.e., when they assume discocyte and spherical shapes, respectively. We also demonstrate that a temporal variation of an RBC’s focal points along the optical axis is correlated to the temporal fluctuations in the RBC’s thickness maps. Furthermore, we show a sort of synchronization of the whole erythrocytes ensemble.
Collapse
Affiliation(s)
- Pasquale Memmolo
- National Council of Research-Istituto di Scienze Applicate e Sistemi Intelligenti "E. Caianiello," Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
| | - Francesco Merola
- National Council of Research-Istituto di Scienze Applicate e Sistemi Intelligenti "E. Caianiello," Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
| | - Lisa Miccio
- National Council of Research-Istituto di Scienze Applicate e Sistemi Intelligenti "E. Caianiello," Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
| | - Martina Mugnano
- National Council of Research-Istituto di Scienze Applicate e Sistemi Intelligenti "E. Caianiello," Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
| | - Pietro Ferraro
- National Council of Research-Istituto di Scienze Applicate e Sistemi Intelligenti "E. Caianiello," Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
| |
Collapse
|
64
|
Katkovnik V, Shevkunov I, Petrov NV, Egiazarian K. High-accuracy off-axis wavefront reconstruction from noisy data: local least square with multiple adaptive windows. OPTICS EXPRESS 2016; 24:25068-25083. [PMID: 27828446 DOI: 10.1364/oe.24.025068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A variational algorithm to object wavefront reconstruction from noisy intensity observations is developed for the off-axis holography scenario with imaging in the acquisition plane. The algorithm is based on the local least square technique proposed in paper [J. Opt. Soc. Am. A21, 367 (2004)]. First, multiple reconstructions of the wavefront are produced for various size and various directional windows applied for localization of estimation. At the second stage, a special statistical rule is applied in order to select the best window size estimate for each pixel of the image and for each of the directional windows. At the third final stage the estimates of the different directions obtained for each pixel are aggregated in the final one. Simulation experiments and real data processing prove that the developed algorithm demonstrate the performance of the extraordinary quality and accuracy for both the phase and amplitude of the object wavefront.
Collapse
|
65
|
Cheremkhin PA, Kurbatova EA. Numerical comparison of scalar and vector methods of digital hologram compression. ACTA ACUST UNITED AC 2016. [DOI: 10.1117/12.2246411] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
66
|
Bianco V, Memmolo P, Paturzo M, Finizio A, Javidi B, Ferraro P. Quasi noise-free digital holography. LIGHT, SCIENCE & APPLICATIONS 2016; 5:e16142. [PMID: 30167185 PMCID: PMC6059929 DOI: 10.1038/lsa.2016.142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/21/2016] [Accepted: 03/27/2016] [Indexed: 05/05/2023]
Abstract
One of the main drawbacks of Digital Holography (DH) is the coherent nature of the light source, which severely corrupts the quality of holographic reconstructions. Although numerous techniques to reduce noise in DH have provided good results, holographic noise suppression remains a challenging task. We propose a novel framework that combines the concepts of encoding multiple uncorrelated digital holograms, block grouping and collaborative filtering to achieve quasi noise-free DH reconstructions. The optimized joint action of these different image-denoising methods permits the removal of up to 98% of the noise while preserving the image contrast. The resulting quality of the hologram reconstructions is comparable to the quality achievable with non-coherent techniques and far beyond the current state of art in DH. Experimental validation is provided for both single-wavelength and multi-wavelength DH, and a comparison with the most used holographic denoising methods is performed.
Collapse
Affiliation(s)
- Vittorio Bianco
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Pasquale Memmolo
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
- E-mail:
| | - Melania Paturzo
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Andrea Finizio
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Bahram Javidi
- ECE Department, University of Connecticut, U-157, Storrs, Connecticut, 06269, USA
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| |
Collapse
|
67
|
Javidi B, Rawat S, Komatsu S, Markman A. Cell identification using single beam lensless imaging with pseudo-random phase encoding. OPTICS LETTERS 2016; 41:3663-3666. [PMID: 27472644 DOI: 10.1364/ol.41.003663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this Letter, we propose a novel compact optical system for automated cell identification. Our system employs pseudo-random encoding of the light modulated by the cells under inspection to capture the unique opto-biological signature of the micro-organisms by an image sensor and without using a microscope objective lens to magnify the object beam. The proposed instrument can be fabricated using a compact light source, a thin diffuser, and an image sensor connected to computational hardware; thus, it can be compact and cost effective. Experiments are presented using the proposed system to identify and classify various micro-objects and demonstrate proof of concept. The captured opto-biological signature pattern can be attributed to the micro-object's morphology, size, sub-cellular complex structure, index of refraction, internal material composition, etc. Using the captured signature of the micro-object, we extract statistical features such as mean, variance, skewness, kurtosis, entropy, and correlation coefficients for cell identification using the random forest classifier. For comparison, similar identification experiments were repeated with a digital shearing interferometer. To the best of our knowledge, this is the first report on automated cell identification using the proposed approach.
Collapse
|
68
|
Liu JP, Wang SY, Tsang PWM, Poon TC. Nonlinearity compensation and complex-to-phase conversion of complex incoherent digital holograms for optical reconstruction. OPTICS EXPRESS 2016; 24:14582-8. [PMID: 27410610 DOI: 10.1364/oe.24.014582] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Incoherent digital holography (IDH) can be realized by optical scanning holography or self-interference incoherent holography. Although IDH can exhibit high quality reconstruction due to its inherently speckle-free property, direct display of an incoherent hologram is a challenge because of its amplitude nonlinearity and the demand of complex modulation. In this paper we propose to compensate the amplitude nonlinearity at the object plane, and use bidirectional error-diffusion method to convert the complex-type incoherent Fresnel hologram to a phase-only Fresnel hologram for display. A spatial light modulator is used to reconstruct the phase-only hologram optically to demonstrate the validity of our proposed method.
Collapse
|
69
|
Affiliation(s)
- Karima Addetia
- Section of Cardiology, Department of Medicine, University of Chicago, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637, USA
| | - Roberto M Lang
- Section of Cardiology, Department of Medicine, University of Chicago, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637, USA
| |
Collapse
|
70
|
Bruckheimer E, Rotschild C, Dagan T, Amir G, Kaufman A, Gelman S, Birk E. Computer-generated real-time digital holography: first time use in clinical medical imaging. Eur Heart J Cardiovasc Imaging 2016; 17:845-9. [DOI: 10.1093/ehjci/jew087] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 04/03/2016] [Indexed: 11/12/2022] Open
|
71
|
Bruckheimer E, Rotschild C. Holography for imaging in structural heart disease. EUROINTERVENTION 2016; 12 Suppl X:X81-X84. [DOI: 10.4244/eijv12sxa15] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
72
|
Horisaki R, Egami R, Tanida J. Experimental demonstration of single-shot phase imaging with a coded aperture. OPTICS EXPRESS 2015; 23:28691-28697. [PMID: 26561137 DOI: 10.1364/oe.23.028691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We experimentally demonstrated single-shot phase imaging with a coded aperture (SPICA), which connects digital holography and coherent diffractive imaging based on compressive sensing to realize the advantages of both methods simultaneously. SPICA allows the observation of a complex field with a simple, single-shot optical setup that does not need reference light and does not suffer from losses associated with the field-of-view and spatial resolution. Experiments showed the promising capabilities of SPICA for single-shot holographic imaging.
Collapse
|
73
|
Kamau EN, Heine J, Falldorf C, Bergmann RB. Dynamic wave field synthesis: enabling the generation of field distributions with a large space-bandwidth product. OPTICS EXPRESS 2015; 23:28920-28934. [PMID: 26561161 DOI: 10.1364/oe.23.028920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a novel approach for the design and fabrication of multiplexed computer generated volume holograms (CGVH) which allow for a dynamic synthesis of arbitrary wave field distributions. To achieve this goal, we developed a hybrid system that consists of a CGVH as a static element and an electronically addressed spatial light modulator as the dynamic element. We thereby derived a new model for describing the scattering process within the inhomogeneous dielectric material of the hologram. This model is based on the linearization of the scattering process within the Rytov approximation and incorporates physical constraints that account for voxel based laser-lithography using micro-fabrication of the holograms in a nonlinear optical material. In this article we demonstrate that this system basically facilitates a high angular Bragg selectivity on the order of 1°. Additionally, it allows for a qualitatively low cross-talk dynamic synthesis of predefined wave fields with a much larger space-bandwidth product (SBWP ≥ 8.7 × 10(6)) as compared to the current state of the art in computer generated holography.
Collapse
|
74
|
Memmolo P, Leo M, Distante C, Paturzo M, Ferraro P. Coding Color Three-Dimensional Scenes and Joining Different Objects by Adaptive Transformations in Digital Holography. ACTA ACUST UNITED AC 2015. [DOI: 10.1109/jdt.2015.2407615] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
75
|
Kozacki T, Falaggis K. Angular spectrum-based wave-propagation method with compact space bandwidth for large propagation distances. OPTICS LETTERS 2015; 40:3420-3423. [PMID: 26176484 DOI: 10.1364/ol.40.003420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Rigorous propagation methods enable diffraction calculations at high NA. However, for the case of large propagation distances and full NA calculations of a signal, common solutions require zero padding or upsampling. This Letter overcomes these problems by introducing a sampling scheme based on compact space bandwidth product representation, which adjusts the sampling frequency of input and propagated field according to the evolution of the generalized space bandwidth product. This sampling concept allows proposing a novel AS method enabling high efficiency, high accuracy, and high-NA diffraction computations at larger propagation distances without need of zero padding or upsampling. The method has several advantages: (1) high accuracy for larger propagation distances; (2) reduced sampling with minimal computation effort; (3) zooming capability; and (4) both focusing and defocusing propagations possible.
Collapse
|
76
|
Liu JP. Spatial coherence analysis for optical scanning holography. APPLIED OPTICS 2015; 54:A59-A66. [PMID: 25967023 DOI: 10.1364/ao.54.000a59] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 10/27/2014] [Indexed: 06/04/2023]
Abstract
In optical scanning holography (OSH), the system can be operated in coherent mode by using a pinhole detector, or in incoherent mode by using a spatially integrating detector. In the coherent mode, the three-dimensional (3D) amplitude transparency of an object is recorded and thus the phase of the object can be retrieved. On the other hand, it is the 3D intensity transparency of the object recorded in the incoherent mode and thus the speckle can be suppressed. OSH in both coherence modes has been well investigated. However, there is no discussion on the case between the coherent mode and incoherent mode, namely, the partial-coherent mode. In this paper, we derived for the first time, to the best of our knowledge, the formula of OSH in various modes of coherence. We found the detector in OSH plays the role of a kind of filter for the field. The retrieved amplitude transparency of the object is thus nonlinearly processed by the mask function of the detector. Consequently, the reconstructed image cannot benefit from the implementation of the partial-coherent mode. On the contrary, significant artifacts usually appear among the reconstructed image and thus the image quality degrades.
Collapse
|