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Construction of a Tabletop Michelson Interferometer (view source)
Revision as of 20:05, 29 April 2010
, 20:05, 29 April 2010no edit summary
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=== Estimating Camera Sensitivity ===
=== Estimating Camera Sensitivity ===
=== Video Analysis ===
=== Video Analysis ===
Originally, it was our intention to perform interferometry to analyze the diamond vibration. After several attempts to use the interferometer, it was determined that the vibration amplitude was simply too high to perform interferometry. Instead, a direct imaging technique was used to analyze the diamond vibration. An interesting phenomenon occurred when the direct imaging device was used. The reflected spot entering the camera lens created an artifact known as a lens flare. Typically lens flares are undesirable, but in our case, the lens flare movement directly correlated to the movement of the reflected beam spot on the lens surface. By careful calibration, the pixel movement on the image versus the angular displacement of the diamond surface was determined. Then, a video of the movement of the flare spot was taken, and then analyzed using a fitting program.
Because of the large number of images, a batching process was developed to aid in the video analysis. First, a built in Linux program, ffmpeg, separates the video into individual frames. Next, a program was developed to determine the center of th flare spot for each image. To find the location of the center of the flare, several lines of code were implemented:
Because of the large number of images, a batching process was developed to aid in the video analysis. First, a built in Linux program, ffmpeg, separates the video into individual frames. Next, a program was developed to determine the center of th flare spot for each image. To find the location of the center of the flare, several lines of code were implemented:
[[Image:Michelson Interferometer.jpg|thumb|Michelson Set-up]]
* [[Interferograms]]
* [[Interferograms]]