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Showing papers in "Optics and Lasers in Engineering in 1980"


Journal ArticleDOI
TL;DR: In this paper, experiments were performed to determine the effect of lens, position and focal plane, speed of cut and power on the cutting and drilling rates of Perspex, and the results were compared to the thermal conductivity and vapour removal theories developed and presented in the paper.

40 citations


Journal ArticleDOI
TL;DR: In this paper, a sensitive moire fringe interferometer has been developed for measuring in-plane strain in engineering materials and structures, which does not have to be used in an environment isolated from external vibration.

20 citations


Journal ArticleDOI
TL;DR: In this article, the experimental vibration amplitudes together with the vibration modes of the PZT-4 transducer radiating front face are presented for generation in various media using an electronic speckle pattern interferometer (ESPI) with reference beam modulation to give resolution down to 20 A of surface amplitude.

16 citations


Journal ArticleDOI
TL;DR: In this paper, a review of theoretical results expressing the fringe visibility as a function of the r.m.s. surface roughness of the test piece for several types of interferometer is presented.

11 citations


Journal ArticleDOI
TL;DR: In this paper, the accuracy of strain measurement, using high resolution opto-electronic evaluation in both cases, is estimated and compared, and the sensitivity and the range of displacements at which the methods are applicable are different however.

5 citations


Journal ArticleDOI
TL;DR: In this paper, the wave fronts from two holographic displacement patterns are modulated by equal but opposite plate rotations and are superimposed to form a moire pattern, and spatial filtering techniques are used to isolate full-field projections of displacement along and normal to the line of sight.

4 citations


Journal ArticleDOI
TL;DR: The use of sandwich hologram interferometry makes it possible to investigate objects of interest to an engineer that is was not able to investigate before as discussed by the authors, and some different applications of the technique are included.

3 citations


Journal ArticleDOI
TL;DR: In this article, an optical apparatus for microdisplacement measurements has been developed, which is characterized by a very small observation area of several square micrometres and offers 1000 measurement points and its resolution ranges from 2 nm to 100 nm.

3 citations


Journal ArticleDOI
TL;DR: In this paper, a structural model of an azimuth tube with an opening and a slip joint at its mid-height was used to determine the torsional stiffness of antenna structures.

1 citations