Mechanical vibration measurement by high-resolution time-averaged digital holography

作者: Dan N Borza

DOI: 10.1088/0957-0233/16/9/019

关键词:

摘要: In digital holography, a challenge inherited from speckle interferometry is the quantitative data processing of time-averaged holograms in view estimating full field vibration amplitudes. Fundamentally, greatest obstacle comes orthogonal components holograms, corrupted by multiplicative, high-frequency phase noise covering deterministic vibration-related phase. The paper describes novel method obtaining through holography high-resolution fringe patterns. three-level approach includes elimination multiplicative synchronous detection followed low-pass filtering. information needed this procedure taken hologram object at rest. complete an automatic correction environmental drift introduced detection. different stages are illustrated experimental results.

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