User:Pranav Rathi/Notebook/OT/2010/08/02/x & y Signal Drift Issue

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Revision as of 13:52, 2 August 2010 by Pranav Rathi (talk | contribs) (New page: ===Setup & procedure=== ====Steps==== # Measure the beam waist (2 x W=1.5) at the eyepiece lens of the telescope. # Setup the (1:1) telescope: In this case two planoconvex lenses (f=38.1mm...)
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Setup & procedure

Steps

  1. Measure the beam waist (2 x W=1.5) at the eyepiece lens of the telescope.
  2. Setup the (1:1) telescope: In this case two planoconvex lenses (f=38.1mm of both) are used.
  3. Measure the beam waist again (2 x W =1.5) at QPD, to make sure that the ratio is 1:1.
  4. Straighten the beam after the telescope, using two aperture techniques.
  5. Setup the QPD in the xyz translation stage.
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