Can underground pipes affect holographic interferometry results?

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The discussion revolves around challenges faced in improving image quality for a holographic speckle-pattern interferometer at Illinois Wesleyan. The team has ensured a stable setup with high-quality optics and secure mounts, yet they still encounter issues with image clarity, particularly with scrolling dark lines appearing during vibrations. Suggestions include examining potential external vibrations from underground pipes and other sources, as well as considering the impact of the image sensor and optics alignment. Participants also discuss the possibility of using alternative methods, like Pockels cells, to achieve better results. Overall, the focus remains on stabilizing the image and identifying the root causes of the quality issues.
  • #31
Stethoscopes are nice when trying to hunt down rogue sources of vibration too. From the sounds of it though, the building should be fairly well insulated from environmental noise.

Claude.
 
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  • #32
Something else just crossed my mind. What about underground pipes? Those can carry vibrations for miles and transfer them directly into the foundation.
 

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