Subtraction digital holography

Demoli, Nazif; Mes̆trović, Jurica; Sović, Ivica

doi:10.1364/ao.42.000798

Cited by 49 publications

(20 citation statements)

References 9 publications

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“…Alternatively, with an aperture at a Fourier plane, the aperture image is suppressed and the conjugate part is used to reconstruct the conjugate image of the object. Combinations of two or more holograms with stochastic change in the object speckles between them resulted in the removal of the dc and twin terms [79,141]. Phase-shifting digital holography very efficiently eliminates the dc and twin image terms, as described before.…”

Section: Suppression Of DC and Twin Image Termsmentioning

confidence: 84%

Principles and techniques of digital holographic microscopy

2010

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Abstract. Digital holography is an emerging field of new paradigm in general imaging applications. We present a review of a subset of the research and development activities in digital holography, with emphasis on microscopy techniques and applications. First, the basic results from the general theory of holography, based on the scalar diffraction theory, are summarized, and a general description of the digital holographic microscopy process is given, including quantitative phase microscopy. Several numerical diffraction methods are described and compared, and a number of representative configurations used in digital holography are described, including off-axis Fresnel, Fourier, image plane, in-line, Gabor, and phase-shifting digital holographies. Then we survey numerical techniques that give rise to unique capabilities of digital holography, including suppression of dc and twin image terms, pixel resolution control, optical phase unwrapping, aberration compensation, and others. A survey is also given of representative application areas, including biomedical microscopy, particle field holography, micrometrology, and holographic tomography, as well as some of the special techniques, such as holography of total internal reflection, optical scanning holography, digital interference holography, and heterodyne holography. The review is intended for students and new researchers interested in developing new techniques and exploring new applications of digital holography. C 2010 Society of Photo-Optical Instrumentation Engineers.

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Section: Suppression Of DC and Twin Image Termsmentioning

confidence: 84%

Principles and techniques of digital holographic microscopy

2010

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“…DH has not only improved the image quality of a conventional microscopy with extended depth of focus, but also conferred considerable advantages over physical methods, particularly time saving (avoiding chemical developing procedures). With computational tools, both zero-order (DC) and first-order conjugate (twin image) noise term can be suppressed numerically, such as angular spectrum filtering [2], speckle method [3], and phase shifting [4][5][6] techniques. Nevertheless, these profound techniques only suppress noises that are derived from reference arm; the object arm, on the other hand, is not being paid with equivalent attention.…”

Section: Introductionmentioning

confidence: 99%

Image fidelity improvement in digital holographic microscopy using optical phase conjugation

Chan

Chew

Shiu

et al. 2018

Optics and Lasers in Engineering

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digital holography, techniques in suppressing noises derived from reference arm are maturely developed. However, techniques for the object counterpart are not being well developed. Optical phase conjugation technique was believed to be a promising method for this interest. A 0°-cut BaTiO3 photorefractive crystal was involved in self-pumped phase conjugation scheme, and was employed to in-line digital holographic microscopy, in both transmission-type and reflection-type configuration. On pure physical compensation basis, results revealed that the image fidelity was improved substantially with 2.9096 times decrease in noise level and 3.5486 times increase in the ability to discriminate noise on average, by suppressing the scattering noise prior to recording stage.

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“…In recent applications, the TADH has been combined with heterodyne detection of optical modulation side bands to attain absolute measurement of small-amplitude vibrations [2]. Fast and good-quality confocal imaging of distant objects via an optical fiber bundle has been demonstrated by combining subtraction holography method [3] and direct accessing to image acquisition interface buffers in which the time-averaged holograms have been temporarily stored [4]. Retrieving the vibration amplitude and phase (necessary for some applications, see Ref [5].)…”

Section: Introductionmentioning

confidence: 99%

Effective procedure for determination of unknown vibration frequency and phase using time-averaged digital holography

et al. 2017

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In time-averaged digital holography (TADH), one records a hologram of a periodically oscillating object by using the exposure time typically much longer than the oscillating period. Problems arise when the total available exposure time is restricted or when the oscillation period is unknown. In this work we investigate effects of short exposure time to the quality of the recorded hologram and show that, to record high fidelity information in a shortest possible time, close estimates of the oscillating period and the phase are required. To that end we propose an advanced procedure based on short hologram exposures that allows obtaining such estimates. The procedure is efficient both in the number of recordings and their total exposure time.

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Subtraction digital holography

Cited by 49 publications

References 9 publications

Principles and techniques of digital holographic microscopy

Principles and techniques of digital holographic microscopy

Image fidelity improvement in digital holographic microscopy using optical phase conjugation

Effective procedure for determination of unknown vibration frequency and phase using time-averaged digital holography

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