Results 161 to 170 of about 10,806,149 (217)

A Speckle Interferometric Flame Research Technique

Technical Physics, 2020
Methods of recording and automated processing of the results of phase-modulated speckle interferometry of optically dense (opaque to intrinsic radiation) flames containing a condensed phase are described. The use of a high-speed single-frame measurement technique and special processing procedures made it possible to determine the spatiotemporal ...
A. Yu. Popov, A. V. Tyurin, V. G. Tkachenko, A. Ya. Bekshaev, V. V. Kalinchak, M. Yu. Trofimenko   +5 more
openaire   +1 more source

Novel Unambiguous Interferometric Technique for Surface Inspection

CLEO/Europe Conference on Lasers and Electro-Optics, 1998
We describe a new interferometric technique using polarisation measurements which eliminates the need to count fringes, giving an unambiguous measurement of surface height. Applicable to the whole image, the height of each pixel element is determined independently without the need for scanning optical components.
J. P. Lesso, A.J. Duncan, W. Sibbett, M. J. Padgett   +3 more
openaire   +1 more source

Synthetic interferometric imaging technique for moving objects

Applied Optics, 1976
It is shown, theoretically and experimentally, that an object traveling through an interference field formed by two coherent point sources can be imaged via synthetic aperture techniques. The time varying signal scattered by the object is electronically detected and then recorded spatially such that the recording is a one-dimensional hologram of the ...
openaire   +2 more sources

Landslide detection, monitoring and prediction with remote-sensing techniques

Nature Reviews Earth & Environment, 2023
N. Casagli, E. Intrieri, V. Tofani, G. Gigli, F. Raspini   +4 more
semanticscholar   +1 more source

Generalized interferometric technique for ultrashort pulse characterization

Applied Optics, 1987
A direct Young interferometric technique as a tool to determine ultrashort chirped Gaussian pulses characteristics is described: the intensity as a function of the order of the minima of the interference pattern depends on a function of the pulse characteristics.
openaire   +2 more sources

Technique for combining incoherent interferometric images

Journal of the Optical Society of America A, 1999
We discuss the use of a physically constrained iterative deconvolution algorithm to combine and deconvolve images taken with interferometric imaging arrays. To demonstrate this method we have simulated imaging with the Large Binocular Telescope [Proc. SPIE3352, 23 (1998)].
E. Keith Hege, Julian C. Christou, Stuart M. Jefferies, Matthew Cheselka   +3 more
openaire   +1 more source

Speckle Interferometric Technique for Astronomical Observations

Journal of Optics, 2003
The speckle imaging is a photographic technique that resolves objects viewed through severely distorted media. The results are insensitive to the errors caused by apparent size of the isoplanatic patch and the telescope aberrations. In this paper, a short descriptions of the atmospheric turbulence and its effect on the flat wavefront from a stellar ...
openaire   +1 more source

Interferometric Spectroscopy Using a Beat Technique

Applied Optics, 1969
T, Dohi, T, Suzuki
openaire   +2 more sources

Rotational Raman Interferometric Technique to Measure Gas Temperatures

Applied Optics, 1975
The rotational Raman interferogram profile of a gas is shown to provide the basis for a sensitive, remote measurement of the gas temperature. The technique is illustrated by means of a feasibility study of a laser radar atmospheric temperature probe. Errors in the measurement are discussed and suggestions given for an improved temperature probe.
openaire   +2 more sources

Interferometric SAR Multitemporal Processing: Techniques and Applications

, 2016
D. Perissin
semanticscholar   +1 more source