Results 271 to 280 of about 190,665 (333)
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Applied Optics, 2014
In this paper, the local convective heat transfer coefficient (h) is measured along the surface of an electrically heated vertical wire using digital holographic interferometry (DHI). Experiments are conducted on wires of different diameters.
Varun Kumar, Manoj Kumar, C. Shakher
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In this paper, the local convective heat transfer coefficient (h) is measured along the surface of an electrically heated vertical wire using digital holographic interferometry (DHI). Experiments are conducted on wires of different diameters.
Varun Kumar, Manoj Kumar, C. Shakher
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Signal tracking approach for phase estimation in digital holographic interferometry.
Applied Optics, 2014In this research work, we introduce a novel approach for phase estimation from noisy reconstructed interference fields in digital holographic interferometry using an unscented Kalman filter.
Rahul G. Waghmare +4 more
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Theory of Holographic Interferometry
The Journal of the Acoustical Society of America, 1969A simple theory of three forms of holographic interferometry “time-average,” multiple-exposure, and “real-time” (live) interferometry is presented, based on a new development in holographic “image synthesis” (complex amplitude addition and subtraction), introduced in 1965 by D. Gabor and G. W. Stroke et al.
G. W. Stroke, R. M. Grant, G. M. Brown
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Digital holographic interferometry: a novel optical calorimetry technique for radiation dosimetry.
Medical Physics (Lancaster), 2014PURPOSE To develop and demonstrate the proof-of-principle of a novel optical calorimetry method to determine radiation absorbed dose in a transparent medium.
A. Cavan, Juergen Meyer
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Shifted Reference Holographic Interferometry
Applied Optics, 1973Conventional holographic interferometry of vibrating objects yields reconstructed images in which the radiance of each point is proportional to the square of the zero-order Bessel function of an argument proportional to the vibration amplitude. Therefore, the vibration pattern appears as a dark outline on the bright background of the nonvibrating ...
Mauro Zambuto, Wolfgang K. Fischer
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Optics Letters, 2014
This Letter proposes a new method for the estimation of the first- and second-order phase derivatives corresponding to strain and curvature from a single fringe pattern in digital holographic interferometry.
R. Kulkarni, P. Rastogi
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This Letter proposes a new method for the estimation of the first- and second-order phase derivatives corresponding to strain and curvature from a single fringe pattern in digital holographic interferometry.
R. Kulkarni, P. Rastogi
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STROBOSCOPIC HOLOGRAPHIC INTERFEROMETRY
Applied Physics Letters, 1968An experimental evaluation of a stroboscopic technique as applied to holographic interferometry is described. This technique is applicable in the analysis of vibrations with high amplitudes and complex wave forms and in the investigation of phase-dependent and nonsymmetrical effects.
P. Shajenko, C. D. Johnson
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Holographic interferometry with multiple wavelengths
Applied Optics, 1997One of the unsolved problems in the well-established field of holographic interferometry is identification of zeroth-order fringes in cases in which the locations of zero displacement are unknown. We offer a simple solution: By making the double-exposure hologram of a white object in full color by using three or more wavelengths, the zeroth-order ...
Tung H. Jeong +2 more
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Capture and display mismatch compensation for real-time digital holographic interferometry.
Applied Optics, 2014Optical holographic interferometry (HI) is realized by two well-known techniques: double exposure holographic interferometry (DEHI) and real-time holographic interferometry (RTHI).
R. Porras-Aguilar +2 more
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Three-Beam Holographic Interferometry
Applied Optics, 1967Holographic interferometry is certainly one of the most useful practical applications of holography. This subject was initiated principally by Stetson and Powell with a double exposure technique. In this paper a new technique is exposed which needs only one exposure of the photographic emulsion.
Léandre Sevigny, Manoranjan De
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