User:Pranav Rathi/Notebook/OT/2010/08/02/x & y Signal Drift Issue: Difference between revisions
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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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Revision as of 13:52, 2 August 2010
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 of both) are used.
- Measure the beam waist again (2 x W =1.5) at QPD, to make sure that the ratio is 1:1.
- Straighten the beam after the telescope, using two aperture techniques.
- Setup the QPD in the xyz translation stage.
