Digital holography using a laser pointer and consumer. What is a digital holography and why is it important. Optimal spatial bandwidth capacity in multiplexed offaxis. Fourstep phaseshifting digital holography simultaneously sensing dualwavelength information using a monochromatic image sensor. The key points of this technique are utilizing the periodicity of a digital. Threedimensional optical holography using a plasmonic. Holography was born as an analog technology, and the development of laser holography. Part of digital holography and threedimensional imaging.
Multiwavelength digital holography utilizing the spacebandwidth capacityenhance article in proceedings of spie the international society for optical engineering 9279 november 2014 with 5. Retinal blood flow in the optic disc revealed by digital holography duration. Ozcan, nondestructive optical characterization tools, verlag dm publishing house, 2008. The two information processing steps in digital holography, recording, and reconstruction are analyzed with. However, the use of coherent light sources introduces annoying visual phenomenon, namely speckle. Resolution enhancement in digital holography by self. Singleshot digital holography based on multiwavelength spatialbandwidthextended capturingtechnique using a reference arm multispectra is proposed. This second edition has been significantly revised and enlarged. Spacebandwidth extension in singleshot digital holography using spatial carrier conference paper july 20 with 6 reads how we measure reads. Principle of spacebandwidth capacityenhanced space digital holography. We identify challenges in hardware and software and collect a set of important.
They are simpler to record and reconstruct, and astronomically cheaper, however resolution is much lower than with holographic. In this article, we propose spacebandwidth capacityenhanced space digital holography to achieve singleshot, highquality, and widearea 3d imaging of dynamic. Digital holography and threedimensional imaging in proceedings digital holography and threedimensional imaging 2019. Increased spacebandwidth product in pixel superresolved lensfree onchip microscopy. In interferometry, including digital holography, two or more holograms are multiplexed into a single image in the space domain. Osa digital holography and threedimensional imaging 2019.
A method for improving the quality of the reconstructed image in spacebandwidth capacityenhanced space digital holography is proposed. The bay area tumor institute nci community oncology research program bati ncorp is a consortium of th. Digital holograms are saved as a file directly and reconstructed using a computer program. Space digital holography is based on an offaxis configuration and is a technique for capturing an object wave with wide spacebandwidth product by introducing high spatialcarrier frequency, intentional aliasing, periodicity of a digital signal, and the optimal arrangements of the angle difference and object wave spectrum. Special applications and techniques like short coherence recording, particle field applications, and comparative holography. Band alignmentdriven oxidative injury to the skin by anataserutile mixedphase titanium dioxide nanoparticles under sunlight exposure. Center itrc support program supervised by the institute for. Although the spacebandwidth product of the digital devices is smaller than those of. Signal processing challenges for digital holographic video. Spacebandwidth capacityenhanced digital holography tatsuki tahara 1. Osa digital holography based on multiwavelength spatial. Various useful and special techniques have been developed to enhance. Phaseshifting digital holography with vortex beam in one.
The ozcan research group refereed journal publications. Pdf spacebandwidth capacityenhanced digital holography. So they use holographic displays to show the hologram, depending on a high level of computation. The next part discusses special techniques such as digital lightinflight holography, holographic endoscopy, information encrypting and comparative holography. Space digital holography is based on an offaxis configuration and is a technique for capturing an object wave with wide spacebandwidth product by introducing high spatialcarrier frequency. Our approach enables spatial digital compression of eight offaxis holograms into a single real. The spacebandwidth product sbp is a measure for the information capacity an optical system possesses.
Digital holograms of a target acquired with a sweptsource laser. By contrast, digital holography 11 is considered to be the ultimate display technology. Addressing simultaneously distinct domains of the temporal and spatial bandwidth of holograms was performed with success for angular, wavelength, space. Multiwavelength digital holography utilizing the space. Spacebandwidth capacityenhanced digital holography, appl.
Digital holographic microscopes can display 3d images of living cells in real time on computers, and digital holographic telepresence is emerging on the technological horizon. Bay area tumor institute ncorp division of cancer prevention. Adaptive digital holographic measurement using phasemode spatial light modulator the second japankorea workshops on digital hologpraphy and information photonics dhip2012 2012. Space bandwidth capacityenhanced digital holography, appl. Digital holography is a powerful imaging technique for 3d vision and display systems. Digital photographic camera computer one of the main drawbacks of microscopy. They are recorded by a video camera and transmitted to a computer for realtime numerical reconstruction. In digital holography, however, the lack of space bandwidth available for. Enhancement of lowquality reconstructed digital hologram images based on frequency extrapolation of large objects under the diffraction limit. Matoba, parallel phaseshifting digital holography and its applications to highspeed 3d imaging and microscopy, technical digest of 2017 osa topical meeting, digital holography and threedimensional imaging dh 2017, m3a. Digital holographic interferometry is discussed in chapter 4.
Principles and techniques of digital holographic microscopy. Spacebandwidth extension in singleshot digital holography. A dmplugin for acquiring ped and larbed patterns, as well as diffraction maps. Image quality improvement of parallel fourstep phaseshifting digital holography by using the algorithm of parallel twostep phaseshifting digital holography. The fifth chapter is dedicated to digital holographic microscopy. Ferraro, investigation of angular multiplexing and demultiplexing of digital. Signal processing challenges for digital holographic video display. Applications in imaging and microscopy are also described. Holograms are generated by combining a coherent reference wave with the wave received from a specimen. The first mentioned type of digital holography finds applications in digital holographic microscopy, particle analysis, and interferometric form and deformation measurement, while the second type constitutes the basis for holographic.
Enhancement of lowquality reconstructed digital hologram. Holographic measurement technology at production speed. We propose a singleshot digital holography in which the space bandwidth available for recording an object wave can be extended in an offaxis configuration. Bandwidth study of volume holography in photorefractive. In contrast, recent advances in digital components and computational techniques have enabled powerful imaging methods, 1,2,3,4,5,6,7,8,9,10 and when these are combined with stateofthe. The authors have extended the chapter on digital holographic microscopy to incorporate new sections on particle sizing, particle image velocimetry and underwater holography. Recently, holography based techniques for controlling the amplitude and phase of freespace beams have been used to achieve surface plasmon holographic displays34,35, beam shaping36, data storage37, digital holographic. Meanwhile, many researchers have focused on the improvement of image quality, such as the spectral estimation of color digital holography 9,10, space bandwidth enhancement of singleshot digital. Digital holography refers to the acquisition and processing of holograms with a digital sensor array, typically a ccd camera or a similar device. Their combined citations are counted only for the first article. We have developed a method to extend the space bandwidth, named spacebandwidth capacityenhanced space digital holography, 4 which we have used to carry out multidimensional sensing. Advances in computers, volume 28 pdf free download.
In this context, we also define the spacebandwidth product sbp, which. Digital holographic microscopes can display 3d images of living cells in real time on. Image rendering, or reconstruction of object data is performed numerically from digitized interferograms. Pdf quantitative phase imaging with digital holographic microscopy applied for labelfree analysis of confluent cell layers. Digital holography is used today for various purposes, such as microscopy, interferometry, surface measurements, storage and threedimensional 3d display systems. Dh, holographic interference is produced by optical processes in real space, while. The key points of this technique are utilizing the periodicity of a digital signal and the undersampling, intentionally setting the aliasing to the recorded hologram, and conducting spatialcarrier phaseshifting interferometry and the fourier transform method.
He named the new imaging principle holography, for its ability to record the. Digital holography for multidimensional sensing with a. Digital holography tries to display the image as realistic as possible, mainly on static holographic planes. Imagequality improvement in spacebandwidth capacity. Analysis in digital holography under the supervision presented by of b. Stated differently, it is the pixel function of an optoelectronic. Space digital holography is based on an offaxis configuration and is a technique for capturing an object wave with wide spacebandwidth product by introducing high spatialcarrier frequency, intentional aliasing, periodicity of a digital. Awatsuji, adaptive digital holographic measurement using phasemode spatial light modulator, technical digest of the second koreajapan workshop on digital holography and. Matoba, parallel phaseshifting digital holography and its applications to highspeed 3d imaging and microscopy, technical digest of 2017 osa topical meeting, digital holography. Quantitative spacebandwidth product analysis in digital holography. The application of digital holography as a viable solution to 3d capture and display technology is examined. The configuration is based on a modified michelson setup with two different 4ftelescopes. Advances in computers volume 28 contributors to this volume mustafa a.
The broadband femtosecond optical reading pulse e r with a center. We use optimal spatial multiplexing of offaxis holograms to fill the entire spatial frequency domain, including the space previously occupied by the intensity of the sample. Recently, holography based techniques for controlling the amplitude and phase of freespace beams have been used to achieve surface plasmon holographic displays 34,35, beam shaping. Tatsuki tahara 1,2, yasuhiro awatsuji 1, kenzo nishio 3, shogo ura 1, osamu matoba 4 and toshihiro kubota 5. Superbandwidth twostep phaseshifting offaxis digital.
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