Precision Measurement of SAW Velocities

Murray, D.W.; Ash, E.A.

doi:10.1109/ultsym.1977.196952

Cited by 16 publications

(3 citation statements)

References 5 publications

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“…Computation of the theoretical profiles made u s e of the velocity dependence of surface waves upon the propagation direction, given in ref. 8. The matching between experiments and theoretical data i s satisfactory and yield confidence both in the model and in the experimental method employed.…”

Section: Methodsmentioning

confidence: 56%

SAW Second Harmonic Fields Nonlinearly Produced by Spatially Limited Beams

Alippi

Palma

et al. 1981

1981 Ultrasonics Symposium

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A theoretical model of second harmonic wave diffraction in SAW propagation i s proposed, which c o n s i d e r s each plane wave in the momentum spectrum of the fundamental wave to generate a second harmonic wave by interaction with a l l the o t h e r s p e c t r a l components: the field is then obtained by the integration of all the partial contributions. Second harmonic fields are detected by means of a high resolution phase contrast optical probing technique. T r a n s v e r s a l p a t t e r n s are presented of the second harmonic field produced in yz-LiNbO3 c r y s t a l s by fundamental beams of different directivity and a comparison is performed with the theoretical profiles.

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Section: Methodsmentioning

confidence: 56%

SAW Second Harmonic Fields Nonlinearly Produced by Spatially Limited Beams

Alippi

Palma

et al. 1981

1981 Ultrasonics Symposium

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“…But this has been questioned. 29 An interesting alternative explanation is that they did use art like anyone else, but that it was not distinctively Christian and may not be obvious to us. In other words the earliest Christians are arthistorically or archaeologically 'invisible'.…”

Section: Christian Artmentioning

confidence: 96%

VI. Later Roman Art

2004

New Surveys in the Classics

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Figure 35 shows one of the most famous of Roman monuments, the Arch of Constantine in Rome. Ironically it is largely famous for being bad art. This arch was dedicated in AD 315 to celebrate the tenth anniversary of the Emperor Constantine’s elevation to power, and more specifically his victory in a civil war which gave him control of Italy in AD 312. The inscriptions in the upper, attic portion of the arch record that it was dedicated in traditional fashion by the senate and people of Rome for Constantine’s divinely inspired defeat of his rival, the ‘tyrant’ Maxentius. Perhaps there is an allusion here to his new patronage of the growing Christian religion. The arch is next to the Colosseum, not far from the older arches of Titus and Septimius Severus, and it resembles the latter in general design. So in many respects it fits in the Roman monumental tradition, yet it is a highly problematic structure.

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“…The measurements were based on an angular spectrum of waves theory [5]. They were performed with a laser probe setup and a procedure identical to the one described in *Current address: Microsoft Corp., Box 97017, Redmond WA 98073-9717.…”

Section: Measurementsmentioning

confidence: 99%

SAW velocities in X-cut LiTaO/sub 3/

Anhorn¹,

Engan²

Proceedings., IEEE Ultrasonics Symposium

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Due to recent interest in SAW devices based on propagation in 112.2' Y-rotated X-cut LiTa03 the SAW propagation velocity in the entire X-surface has been characterized by laser probe measurements. Results obtained include velocities for free and shorted surfaces. Also metal loading influence on velocity has been measured. The results are given as trigonometric expansions with tabulated coefficients.

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Precision Measurement of SAW Velocities

Cited by 16 publications

References 5 publications

SAW Second Harmonic Fields Nonlinearly Produced by Spatially Limited Beams

SAW Second Harmonic Fields Nonlinearly Produced by Spatially Limited Beams

VI. Later Roman Art

SAW velocities in X-cut LiTaO/sub 3/

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