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Maddalena, L. (author), Pozzi, Paolo (author), Ceffa, Nicolò G. (author), Hoeven, Bas van der (author), Carroll, E.C.M. (author)Light-sheet microscopy is a powerful method for imaging small translucent samples in vivo, owing to its unique combination of fast imaging speeds, large field of view, and low phototoxicity. This chapter briefly reviews state-of-the-art technology for variations of light-sheet microscopy. We review recent examples of optogenetics in...book chapter 2023
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Maddalena, L. (author)Optogenetics is a powerful addition to the spectrum of techniques available in neuroscience to investigate neurophysiology and unravel how neural circuit structure is related to circuit function. This technique relies on introducing lightsensitive proteins or molecules as actuators to transduce an optical signal into a physiological perturbation...doctoral thesis 2022
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Maddalena, L. (author), Ouwehand, M. (author), Safdar, H. (author), Carroll, E.C.M. (author)In deep tissue imaging, pulsed near-infrared lasers commonly provide high peak powers needed for nonlinear absorption, but average power and linear absorption can be limiting factors for tissue damage through heat. We implemented intra-cavity dumping within a mode-locked Ti:Sapphire laser used for two-photon computer generated holography...journal article 2022
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van Grootheest, D.N. (author), Agbana, T.E. (author), Diehl, J.C. (author), van Diepen, Angela (author), Bezzubik, Vitalii (author), Vdovin, Gleb (author)Significance: Particle field holography is a versatile technique to determine the size and distribution of moving or stationary particles in air or in a liquid without significant disturbance of the sample volume. Although this technique is applied in biological sample analysis, it is limited to small sample volumes, thus increasing the number...journal article 2021
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van Rooij, J. (author)Optical imaging is the imaging of objects with visible light. It is a tool often used for diagnostic purposes, such as in biomedical and material sciences. Digital holography is an optical imaging technique that captures and images the amplitude as well as the phase (the complex amplitude) of the lightwave. An advantage is that the complex...doctoral thesis 2020
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Agbana, T.E. (author)Malaria remains an important cause of high morbidity and mortality worldwide. According to World Health Organisation (WHO) malaria report for 2017, malaria accounted for the death of 435,000 people. It is the leading cause of death among pregnant women and little children. 11% of maternal and 20% of under–five deaths are attributed to malaria...doctoral thesis 2020
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Gong, H. (author)This dissertation has mainly aimed at developing novel techniques, methodologies for measuring the optical field, specifically both the amplitude and phase distribution. Furthermore, we have attempted to extend their applications in the scope of optical imaging, including lensless/holographic imaging, quantitative phase imaging and the...doctoral thesis 2019
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- Vicarelli, L. (author) doctoral thesis 2017
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van Rooij, J. (author), Kalkman, J. (author)We use digital holography to quantify surface topography of rough objects in full-field. We calculate the variance of the intensity image as a focus metric over a set of reconstruction distances for each pixel, which results in a focus metric curve. The distance where the variance peaks is an estimate for the depth. First we analyze the lateral...conference paper 2017
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Vdovin, Gleb (author), Gong, H. (author), Soloviev, O.A. (author), Pozzi, P. (author), Verhaegen, M.H.G. (author)We have experimentally demonstrated a lensless coherent microscope based on direct registration of the complex optical field by sampling the pupil with a sequence of two-point interferometers formed by a digital micromirror device. Complete registration of the complex amplitude in the pupil of the imaging system, without any reference beam,...journal article 2015
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Horchens, L. (author)Flexural waves play a significant role for the radiation of sound from plates. The analysis of flexural wave fields enables the detection of sources and transmission paths in plate-like structures. The measurement of these wave fields can be carried out indirectly by means of near-field acoustic holography, which determines the vibrational wave...journal article 2011
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Semin, N.V. (author), Poelma, C. (author), Drost, S. (author), Westerweel, J. (author)The potential of in-line digital holography to locate and measure the size and position of filaments, i.e. thin wire-like objects, distributed throughout a thick volume has been investigated. In this paper two approaches are introduced to study filaments of varying diameter. (1) It is shown analytically and experimentally that for a gradual...journal article 2010
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Xu, M. (author), De Boer, D.K.G. (author), Van Heesch, C.M. (author), Wachters, A.J.H. (author), Urbach, H.P. (author)Polarization gratings can be realized by polarization holographic recording in photoanisotropic materials. In this paper, we study two types of polarization gratings. One is recorded with two orthogonally circularly (OC) polarized beams and the other one with two orthogonally linearly (OL) polarized beams. The interference of both cases is...journal article 2010
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Xu, M. (author)Diffraction gratings are being used to manipulate light in many different applications, such as in flat panel display systems, modern lighting systems, and optical recording. Diffraction gratings can be made polarization selective due to form birefringence. An alternative approach to polarization selective gratings is to use birefringent...doctoral thesis 2009
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Ooms, T.A. (author)This thesis contributes to the development of an instrument that can measure fluid flow velocity in a three-dimensional (3D) measurement domain by holographic imaging.doctoral thesis 2008
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- Ooms, T. (author), Koek, W. (author), Westerweel, J. (author) journal article 2008
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Koek, W.D. (author)To gain better insight into the behaviour of turbulent flow there is a demand for a practical measurement instrument to perform three-dimensional flow measurements. Holography is a three-dimensional imaging technique, and as such is ideally suited for this purpose. Because flow media (such as water and air) are generally transparent, optical...doctoral thesis 2006
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- Ooms, T. (author), Koek, W. (author), Braat, J. (author), Westerweel, J. (author) journal article 2006
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Koek, W.D. (author), Chan, V.S.S. (author), Ooms, T.A. (author), Bhattacharya, N. (author), Westerweel, J. (author), Braat, J.J.M. (author)We present a novel holographic particle image velocimetry (HPIV) system using a reversible holographic material as the recording medium. In HPIV the three-dimensional flow field throughout a volume is detected by adding small tracer particles to a normally transparent medium. By recording the particle distribution twice with a known time shift...conference paper 2005
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't Hart, W.G.J. (author)An experimental investigation was performed to examine the effect of low energy impact damage on tension-compression fatigue properties of sandwich panels. The specimens consisted of a 9 mm thick Nomex honeycomb and face sheets of (0,± 45) and (± 45,0) Carbon/epoxy. Drop weight impact was applied to create internal laminate damage. In order to...report 1981