1. Common path Michelson interferometer based on multiple reflections within the sample arm: sensor applications and imaging artefacts

    Common path Michelson interferometer based on multiple reflections within the sample arm: sensor applications and imaging artefacts
    We present a simple common path dual beam interferometric sensor platform using a low-coherence source. In our implementation we exploit (in a controlled manner) the multiple reflections within the sample arm to provide the reference arm. This simple setup removes the need for a separate reference arm and allows an alternative architecture for using low-coherence sources in interferometric sensors. We demonstrate the sensor characteristics by using it as a vibrometer and displacement sensor (without directional sensitivity). Vibration frequencies from 50 to 300 Hz were measured with 1% precision while displacements from 6 to 24 ┬Ám were measured with 125 nm ...
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