The Experts below are selected from a list of 13632 Experts worldwide ranked by ideXlab platform
Joseph Rosen - One of the best experts on this subject based on the ideXlab platform.
-
interferenceless coded aperture correlation holography a new technique for recording incoherent digital Holograms without two wave interference
Optics Express, 2017Co-Authors: A Vijayakumar, Joseph RosenAbstract:Recording digital Holograms without wave interference simplifies the optical systems, increases their power efficiency and avoids complicated aligning procedures. We propose and demonstrate a new technique of digital hologram acquisition without two-wave interference. Incoherent light emitted from an object propagates through a random-like coded phase mask and recorded directly without interference by a digital camera. In the training stage of the system, a point spread hologram (PSH) is first recorded by modulating the light diffracted from a point object by the coded phase masks. At least two different masks should be used to record two different intensity distributions at all possible axial locations. The various recorded patterns at every axial location are superposed in the computer to obtain a complex valued PSH library cataloged to its axial location. Following the training stage, an object is placed within the axial boundaries of the PSH library and the light diffracted from the object is once again modulated by the same phase masks. The intensity patterns are recorded and superposed exactly as the PSH to yield a complex hologram of the object. The object information at any particular plane is reconstructed by a cross-correlation between the complex valued hologram and the appropriate element of the PSH library. The characteristics and the performance of the proposed system were compared with an equivalent regular imaging system.
-
in line finch super resolution digital holographic fluorescence microscopy using a high efficiency transmission liquid crystal grin lens
Optics Letters, 2013Co-Authors: Gary Brooker, Nisan Siegel, Joseph Rosen, Nobuyuki Hashimoto, Makoto Kurihara, Ayano TanabeAbstract:We report a new optical arrangement that creates high-efficiency, high-quality Fresnel incoherent correlation holography (FINCH) Holograms using polarization sensitive transmission liquid crystal gradient index (TLCGRIN) diffractive lenses. In contrast, current universal practice in the field employs a reflective spatial light modulator (SLM) to separate sample and reference beams. Polarization sensitive TLCGRIN lenses enable a straight optical path, have >90% transmission efficiency, are not pixilated, and are free of many limitations of reflective SLM devices. For each sample point, two spherical beams created by a glass lens in combination with a polarization sensitive TLCGRIN lens interfere and create a hologram and resultant super resolution image.
-
faithful reconstruction of digital Holograms captured by finch using a hamming window function in the fresnel propagation
Optics Letters, 2013Co-Authors: Nisan Siegel, Joseph Rosen, Gary BrookerAbstract:Recent advances in Fresnel incoherent correlation holography (FINCH) increase the signal-to-noise ratio in hologram recording by interference of images from two diffractive lenses with focal lengths close to the image plane. Holograms requiring short reconstruction distances are created that reconstruct poorly with existing Fresnel propagation methods. Here we show a dramatic improvement in reconstructed fluorescent images when a 2D Hamming window function substituted for the disk window typically used to bound the impulse response in the Fresnel propagation. Greatly improved image contrast and quality are shown for simulated and experimentally determined FINCH Holograms using a 2D Hamming window without significant loss in lateral or axial resolution.
-
enhanced resolution and throughput of fresnel incoherent correlation holography finch using dual diffractive lenses on a spatial light modulator slm
Optics Express, 2012Co-Authors: Barak Katz, Roy Kelner, Joseph Rosen, Gary BrookerAbstract:Fresnel incoherent correlation holography (FINCH) records Holograms under incoherent illumination. FINCH was implemented with two focal length diffractive lenses on a spatial light modulator (SLM). Improved image resolution over previous single lens systems and at wider bandwidths was observed. For a given image magnification and light source bandwidth, FINCH with two lenses of close focal lengths yields a better hologram in comparison to a single diffractive lens FINCH. Three techniques of lens multiplexing on the SLM were tested and the best method was randomly and uniformly distributing the two lenses. The improved quality of the hologram results from a reduced optical path difference of the interfering beams and increased efficiency.
-
theoretical and experimental demonstration of resolution beyond the rayleigh limit by finch fluorescence microscopic imaging
Optics Express, 2011Co-Authors: Joseph Rosen, Nisan Siegel, Gary BrookerAbstract:Fresnel Incoherent Correlation Holography (FINCH) enables Holograms to be recorded from incoherent light with just a digital camera and spatial light modulator. We previously described its application to general three dimensional incoherent imaging and specifically to fluorescence microscopy, wherein one complex hologram contains the three dimensional information in the field of view, obviating the need for scanning or serial sectioning. We have now further analyzed FINCH in view of linear system theory and in comparison to conventional coherent and incoherent two dimensional imaging systems. We demonstrate, theoretically and experimentally, improved resolution by FINCH, when compared to conventional imaging.
Gary Brooker - One of the best experts on this subject based on the ideXlab platform.
-
in line finch super resolution digital holographic fluorescence microscopy using a high efficiency transmission liquid crystal grin lens
Optics Letters, 2013Co-Authors: Gary Brooker, Nisan Siegel, Joseph Rosen, Nobuyuki Hashimoto, Makoto Kurihara, Ayano TanabeAbstract:We report a new optical arrangement that creates high-efficiency, high-quality Fresnel incoherent correlation holography (FINCH) Holograms using polarization sensitive transmission liquid crystal gradient index (TLCGRIN) diffractive lenses. In contrast, current universal practice in the field employs a reflective spatial light modulator (SLM) to separate sample and reference beams. Polarization sensitive TLCGRIN lenses enable a straight optical path, have >90% transmission efficiency, are not pixilated, and are free of many limitations of reflective SLM devices. For each sample point, two spherical beams created by a glass lens in combination with a polarization sensitive TLCGRIN lens interfere and create a hologram and resultant super resolution image.
-
faithful reconstruction of digital Holograms captured by finch using a hamming window function in the fresnel propagation
Optics Letters, 2013Co-Authors: Nisan Siegel, Joseph Rosen, Gary BrookerAbstract:Recent advances in Fresnel incoherent correlation holography (FINCH) increase the signal-to-noise ratio in hologram recording by interference of images from two diffractive lenses with focal lengths close to the image plane. Holograms requiring short reconstruction distances are created that reconstruct poorly with existing Fresnel propagation methods. Here we show a dramatic improvement in reconstructed fluorescent images when a 2D Hamming window function substituted for the disk window typically used to bound the impulse response in the Fresnel propagation. Greatly improved image contrast and quality are shown for simulated and experimentally determined FINCH Holograms using a 2D Hamming window without significant loss in lateral or axial resolution.
-
enhanced resolution and throughput of fresnel incoherent correlation holography finch using dual diffractive lenses on a spatial light modulator slm
Optics Express, 2012Co-Authors: Barak Katz, Roy Kelner, Joseph Rosen, Gary BrookerAbstract:Fresnel incoherent correlation holography (FINCH) records Holograms under incoherent illumination. FINCH was implemented with two focal length diffractive lenses on a spatial light modulator (SLM). Improved image resolution over previous single lens systems and at wider bandwidths was observed. For a given image magnification and light source bandwidth, FINCH with two lenses of close focal lengths yields a better hologram in comparison to a single diffractive lens FINCH. Three techniques of lens multiplexing on the SLM were tested and the best method was randomly and uniformly distributing the two lenses. The improved quality of the hologram results from a reduced optical path difference of the interfering beams and increased efficiency.
-
theoretical and experimental demonstration of resolution beyond the rayleigh limit by finch fluorescence microscopic imaging
Optics Express, 2011Co-Authors: Joseph Rosen, Nisan Siegel, Gary BrookerAbstract:Fresnel Incoherent Correlation Holography (FINCH) enables Holograms to be recorded from incoherent light with just a digital camera and spatial light modulator. We previously described its application to general three dimensional incoherent imaging and specifically to fluorescence microscopy, wherein one complex hologram contains the three dimensional information in the field of view, obviating the need for scanning or serial sectioning. We have now further analyzed FINCH in view of linear system theory and in comparison to conventional coherent and incoherent two dimensional imaging systems. We demonstrate, theoretically and experimentally, improved resolution by FINCH, when compared to conventional imaging.
-
optimal resolution in fresnel incoherent correlation holographic fluorescence microscopy
Optics Express, 2011Co-Authors: Gary Brooker, Nisan Siegel, Victor Wang, Joseph RosenAbstract:Fresnel Incoherent Correlation Holography (FINCH) enables Holograms and 3D images to be created from incoherent light with just a camera and spatial light modulator (SLM). We previously described its application to microscopic incoherent fluorescence wherein one complex hologram contains all the 3D information in the microscope field, obviating the need for scanning or serial sectioning. We now report experiments which have led to the optimal optical, electro-optic, and computational conditions necessary to produce Holograms which yield high quality 3D images from fluorescent microscopic specimens. An important improvement from our previous FINCH configurations capitalizes on the polarization sensitivity of the SLM so that the same SLM pixels which create the spherical wave simulating the microscope tube lens, also pass the plane waves from the infinity corrected microscope objective, so that interference between the two wave types at the camera creates a hologram. This advance dramatically improves the resolution of the FINCH system. Results from imaging a fluorescent USAF pattern and a pollen grain slide reveal resolution which approaches the Rayleigh limit by this simple method for 3D fluorescent microscopic imaging.
S Lukyanchuk - One of the best experts on this subject based on the ideXlab platform.
-
dielectric meta Holograms enabled with dual magnetic resonances in visible light
ACS Nano, 2017Co-Authors: Inki Kim, Shuang Zhang, Lei Zhang, S Lukyanchuk, Muhammad Qasim Mehmood, Muhammad Sabieh Anwa, Murtaza Saleem, Dasol Lee, K NamAbstract:Efficient transmission-type meta-Holograms have been demonstrated using high-index dielectric nanostructures based on Huygens’ principle. It is crucial that the geometry size of building blocks be judiciously optimized individually for spectral overlap of electric and magnetic dipoles. In contrast, reflection-type meta-Holograms using the metal/insulator/metal scheme and geometric phase can be readily achieved with high efficiency and small thickness. Here, we demonstrate a general platform for design of dual magnetic resonance based meta-Holograms based on the geometric phase using silicon nanostructures that are quarter wavelength thick for visible light. Significantly, the projected holographic image can be unambiguously observed without a receiving screen even under the illumination of natural light. Within the well-developed semiconductor industry, our ultrathin magnetic resonance-based meta-Holograms may have promising applications in anticounterfeiting and information security.
-
silicon multi meta Holograms for the broadband visible light
Laser & Photonics Reviews, 2016Co-Authors: Ku Huang, Zhaogang Dong, Shengtao Mei, Lei Zhang, Yan Ju Liu, Hong Liu, Haibi Zhu, Jinghua Teng, S LukyanchukAbstract:The dielectric metasurface hologram promises higher efficiencies due to lower absorption than its plasmonic counterpart. However, it has only been used, up to now, for controlling linear-polarization photons to form single-plane holographic images in the near-infrared region. Here, we report a transmission-type metahologram achieving images in three colors, free from high-order diffraction and twin-image issues, with 8-level modulation of geometric phase by controlling photon spin via precisely patterned Si nanostructures with varying orientations. The resulting real and virtual holographic images with spin dependence of incident photons natively enable the spin degeneracy removal of light, leading to a metahologram-enabled spin Hall effect of light. Low-absorption dielectrics also enable us to create Holograms for short-wavelength light down to 480 nm, thus spanning the three primary colors. It possesses the potential for compact color-display chips using mature semiconductor processes, and holds significant advantages over previous metaHolograms operating at longer wavelengths.
Yasuhiro Takaki - One of the best experts on this subject based on the ideXlab platform.
-
improvement of gray scale representation of horizontally scanning holographic display using error diffusion
Optics Letters, 2014Co-Authors: Yuji Matsumoto, Yasuhiro TakakiAbstract:Horizontally scanning holography can enlarge both screen size and viewing zone angle. A microelectromechanical-system spatial light modulator, which can generate only binary images, is used to generate hologram patterns. Thus, techniques to improve gray-scale representation in reconstructed images should be developed. In this study, the error diffusion technique was used for the binarization of Holograms. When the Floyd–Steinberg error diffusion coefficients were used, gray-scale representation was improved. However, the linearity in the gray-scale representation was not satisfactory. We proposed the use of a correction table and showed that the linearity was greatly improved.
-
reduction of image blurring of horizontally scanning holographic display
Optics Express, 2010Co-Authors: Yasuhiro Takaki, Naoya OkadaAbstract:A horizontally scanning holographic display offers a wide viewing angle and a large hologram size. To obtain this display, a series of images generated by a high-speed spatial light modulator are imaged to vertically long images (elementary Holograms) by an anamorphic imaging system and are aligned horizontally by a horizontal scanner. However, scan error and focusing error cause blurring in the reconstructed images. In this study, the scan error is corrected by measuring the positions and pixel pitches of the elementary Holograms in advance. The focusing error is corrected by experimentally determining the focusing parameter that is used to calculate the elementary Holograms.
Nisan Siegel - One of the best experts on this subject based on the ideXlab platform.
-
in line finch super resolution digital holographic fluorescence microscopy using a high efficiency transmission liquid crystal grin lens
Optics Letters, 2013Co-Authors: Gary Brooker, Nisan Siegel, Joseph Rosen, Nobuyuki Hashimoto, Makoto Kurihara, Ayano TanabeAbstract:We report a new optical arrangement that creates high-efficiency, high-quality Fresnel incoherent correlation holography (FINCH) Holograms using polarization sensitive transmission liquid crystal gradient index (TLCGRIN) diffractive lenses. In contrast, current universal practice in the field employs a reflective spatial light modulator (SLM) to separate sample and reference beams. Polarization sensitive TLCGRIN lenses enable a straight optical path, have >90% transmission efficiency, are not pixilated, and are free of many limitations of reflective SLM devices. For each sample point, two spherical beams created by a glass lens in combination with a polarization sensitive TLCGRIN lens interfere and create a hologram and resultant super resolution image.
-
faithful reconstruction of digital Holograms captured by finch using a hamming window function in the fresnel propagation
Optics Letters, 2013Co-Authors: Nisan Siegel, Joseph Rosen, Gary BrookerAbstract:Recent advances in Fresnel incoherent correlation holography (FINCH) increase the signal-to-noise ratio in hologram recording by interference of images from two diffractive lenses with focal lengths close to the image plane. Holograms requiring short reconstruction distances are created that reconstruct poorly with existing Fresnel propagation methods. Here we show a dramatic improvement in reconstructed fluorescent images when a 2D Hamming window function substituted for the disk window typically used to bound the impulse response in the Fresnel propagation. Greatly improved image contrast and quality are shown for simulated and experimentally determined FINCH Holograms using a 2D Hamming window without significant loss in lateral or axial resolution.
-
theoretical and experimental demonstration of resolution beyond the rayleigh limit by finch fluorescence microscopic imaging
Optics Express, 2011Co-Authors: Joseph Rosen, Nisan Siegel, Gary BrookerAbstract:Fresnel Incoherent Correlation Holography (FINCH) enables Holograms to be recorded from incoherent light with just a digital camera and spatial light modulator. We previously described its application to general three dimensional incoherent imaging and specifically to fluorescence microscopy, wherein one complex hologram contains the three dimensional information in the field of view, obviating the need for scanning or serial sectioning. We have now further analyzed FINCH in view of linear system theory and in comparison to conventional coherent and incoherent two dimensional imaging systems. We demonstrate, theoretically and experimentally, improved resolution by FINCH, when compared to conventional imaging.
-
optimal resolution in fresnel incoherent correlation holographic fluorescence microscopy
Optics Express, 2011Co-Authors: Gary Brooker, Nisan Siegel, Victor Wang, Joseph RosenAbstract:Fresnel Incoherent Correlation Holography (FINCH) enables Holograms and 3D images to be created from incoherent light with just a camera and spatial light modulator (SLM). We previously described its application to microscopic incoherent fluorescence wherein one complex hologram contains all the 3D information in the microscope field, obviating the need for scanning or serial sectioning. We now report experiments which have led to the optimal optical, electro-optic, and computational conditions necessary to produce Holograms which yield high quality 3D images from fluorescent microscopic specimens. An important improvement from our previous FINCH configurations capitalizes on the polarization sensitivity of the SLM so that the same SLM pixels which create the spherical wave simulating the microscope tube lens, also pass the plane waves from the infinity corrected microscope objective, so that interference between the two wave types at the camera creates a hologram. This advance dramatically improves the resolution of the FINCH system. Results from imaging a fluorescent USAF pattern and a pollen grain slide reveal resolution which approaches the Rayleigh limit by this simple method for 3D fluorescent microscopic imaging.