Quantitative measurement of the vibrational amplitude and phase in photorefractive time‐average interferometry: A comparison with electronic speckle pattern interferometry
作者： Henrik Rohleder , Paul M. Petersen , A. Marrakchi
DOI: 10.1063/1.357063
关键词:
摘要: Time‐average interferometry is dealt with using four‐wave mixing in photorefractive Bi12SiO20. By introducing a proper sinusoidal phase shift the forward pump beam it possible to measure amplitude and everywhere on vibrating object. Quantitative measurements of structure are demonstrated time average interferometry. The interferometer compared performance commercial electronic speckle pattern (ESPI). It shown that dynamic holographic improves image quality considerably able extend measurable range for acoustic vibration frequency what obtainable ESPI equipment.
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