Journal ArticleDOI
Contribution to the interferometric measurement of sub‐angstrom vibrations
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TLDR
In this paper, a Michelson interferometer was used for the measurement of low-frequency vibrational amplitudes in the sub-angstrom range (down to 10−3 A) as a function of temperature.Abstract:
A Michelson interferometer is described for the measurement of low‐frequency vibrational amplitudes in the sub‐angstrom range (down to 10−3 A) as a function of temperature. For this purpose a temperature stabilizing circuit has been developed. The use of a condensor microphone as an electromechanical feedback transducer opens up the possibility to relate the amplitude measurements to the wavelength of light. By these means the accuracy, reliability, and versatility of the interferometer are considerably improved and the draw‐backs of existing set ups are effectively eliminated.read more
Citations
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Journal ArticleDOI
Interferometric measurements of electric field-induced displacements in piezoelectric thin films
TL;DR: In this article, a double-beam interferometer was proposed to suppress the bending effect of the substrate bending motion in piezoelectric thin-film measurements, which was shown to resolve small displacements without using lock-in technique.
Journal ArticleDOI
Laser interferometer for the study of piezoelectric and electrostrictive strains
TL;DR: In this article, a modified Michelson interferometer is used to study the strain properties of piezoelectric and electrostrictive materials, and a feedback loop is introduced to stabilize the system against the low-frequency optical path-length drifting and the system is capable of resolving displacements of the order of 10−3 A.
Journal ArticleDOI
Piezoelectric strain in lead zirconate titante ceramics as a function of electric field, frequency, and dc bias
TL;DR: In this article, the authors investigated the electromechanical response of piezoelectric ceramics as a function of the amplitude and frequency of large electric fields and studied the effects of dc bias fields.
Journal ArticleDOI
A sensitive double beam laser interferometer for studying high-frequency piezoelectric and electrostrictive strains
W. Y. Pan,L. E. Cross +1 more
TL;DR: In this paper, a double beam laser interferometer is built up to study high-frequency piezoelectric and electrostrictive strains, which is capable of resolving a displacement of 10−2 A using lock-in detection and measuring the strain all the way to the resonance frequencies using a digital oscilloscope for detection.
Journal ArticleDOI
Fiber optic heterodyne interferometer for vibration measurements in biological systems
TL;DR: An optical heterodyne interferometer utilizing a fiber optic target probe and a digital phase compensation system and the effect of background motions on output is described.
References
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Journal ArticleDOI
An optical homodyne technique for measurement of amplitude and phase of subangstrom ultrasonic vibrations
S. Sizgoric,A.A. Gundjian +1 more
TL;DR: In this article, an optical homodyne technique was used to measure sub-angstrom dynamic mechanical deformations in the frequency domain and in the time domain with a high sensitivity; displacements less than 10 2A were measured with normal environment acoustic noise.
Journal ArticleDOI
A Refinement of the Michelson-Morley Experiment.
TL;DR: The investigation was undertaken to test the conclusions recently drawn by Professor D. C. Miller from his repetition of the Michelson-Morley experiment, and seems to have abandoned the idea that the magnitude of the indicated velocity depends on the altitude above sea level at which the observations are made.
Journal ArticleDOI
XXVIII. Interference phenomena in a new form of refractometer
TL;DR: In this paper, the interference phenomena in a new form of refractometer were investigated and the authors proposed a method to detect interference in refractometers based on the interference phenomenon.
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