Application of holography to photoelasticity.
Holography used to record birefringent pattern of photoelastic specimen and separate principal stress
Fourney, M. E.↗
SEARCH · Engineering Papers
Results for “holography”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
The effect of object motion in Fraunhofer holography with application to velocity measurements
Object motion effect in Fraunhofer holography with application to velocity measurements
Dotson, W. P., Jr.↗
A new class of optical imaging systems achieving aperture synthesis from non- conventional optics by a posteriori lensless Fourier-transform holography.
Optical imaging systems achieving aperture synthesis by lensless Fourier transform holography, noting X ray astronomy, ultrasonic and space applications
Stroke, G. W.↗
The effect of object motion in Fraunhofer holography with application to velocity measurements
Experimental results extend the Fraunhofer holography theory to include moving objects. Conclusions indicate objects may move up to ten times their mean diameter during observation time. Their motion produces fringe patterns descriptive of that motion from which it is possible to reconstruct the hologram and measure the velocity.
Dotson, W. P., Jr.↗
A calculation of edge smear in far-field holography using a short-cut edge trace technique
Edge smear in far field holography as function of interference orders, using short-cut trace technique
Robinson, D. M.↗
Pulsed laser holography
High speed pulsed ruby laser holography, discussing transmission-reflection holocameras and applications
Heflinger, L. O.↗
Pulsed laser holography - New instrumentation for use in the investigation of liquid rocket combustion
Pulsed laser holography for liquid rocket combustion studies, describing apparatus and techniques
Mathews, B. J.↗
Applications of holography to vibrations, transient response, and wave propagation
Applications of holography to vibrations, transient response, and wave propagation
Aprahamian, R.↗
Focused image holography with extended sources Patent
Development of focused image holography with extended sources
Rosen, L.↗
Lunar surface holography experiment instrument feasibility demonstration Final report, 27 Jul. - 30 Nov. 1970
Prototype holocamera and playback system for lunar surface holography experiment
Close, D. H.↗
Investigation to determine the feasibility of employing laser beam holography for the detection and characterization of bond defects in composite material structures Final report
Determining feasibility of using laser beam holography for detection and characterization of bond defects in composite material structures
Aas, H. G.↗
General theory of holography
Holography theory, analyzing coherent, incoherent and modulated incoherent forms in SNR terms
Hildebrand, B. P.↗
Pulsed laser holography
Pulsed laser holography, discussing illumination source and holocameras for high contrast recording with Q switched ruby lasers
Heflinger, L. O.↗
Holography and holographic interferometry - Industrial applications
Holography and interferometry industrial applications, considering three dimensional imaging, precision distance measurement, nondestructive testing and structural strains and failures detection
Wuerker, R. F.↗
Holography - Potential nondestructive testing tool
Holography as nondestructive testing tool, considering application in vibration analysis, stress/strain measurement, bond inspection, internal flaw detection and displacement measurement
Erf, R. K.↗
Applications of optical holography to applied mechanics.
This paper provides a brief summary of applications of optical holography and holographic interferometry to applied solid mechanics. Basic equations commonly used in fringe interpretation are described and used to reduce the data contained on holographic interferograms. A comparison of data obtained holographically with analytical prediction is given wherever possible. Applications contained herein include front surface physics, study of bomb breakup, transverse wave propagation, study of mode shapes of panels at elevated temperatures, nondestructive testing, and vibration analysis.
Aprahamian, R.↗
Resolution of defects by microwave holography.
Basic techniques for microwave holography are considered, giving attention to ways of approaching the problem, swept frequency depth resolution, optical processing of swept frequency data, B-scans with optical processing, and the side-looking radar principle. Aspects of image formation with Vander Lugt filters are discussed together with holograms for Vander Lugt filter imaging. It is shown that a single basic scanning operation with microwaves can produce records for optical processing to provide any of the common readouts used in flaw detection.
Cribbs, R. W.↗
Feasibility of microwave holography for imaging the sea surface
The possibility of imaging the sea surface in three dimensions by means of microwave holography from a low-flying aircraft is considered. Data cover a brief feasibility study and a review of some computer experiments in which it was demonstrated that it is possible to compute three-dimensional images of objects from raw holographic data recorded on magnetic tape. These experiments used synthetic data.
Wells, W.↗