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Mon Feb 4 00:39:08 2013, Koji, Optics, Characterization, Wedge measurement with the autocollimator and the rotation stage
Wed Feb 6 02:34:10 2013, Koji, Optics, Characterization, Wedge measurement with the autocollimator and the rotation stage
Fri Mar 1 23:52:18 2013, Koji, Optics, Characterization, Wedge measurement with the autocollimator and the rotation stage
Mon Feb 4 00:39:08 2013
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Wedge measurement with the autocollimator and the rotation stage
Mount the tombstone prism on the prism mount. The mount is fixed on the rotation stage.
Locate the prism in front of the autocollimator.
Find the retroreflected reticle in the view. Adjust the focus if necessary.
Confirm that the rotation of the stage does not change the height of the reticle in the view.
If it does, rotate the AC around its axis to realize it.
This is to match the horizontal reticle to the rotation plane.
Use the rotation stage and the alignment knobs to find the reticle at the center of the AC. Make sure the reticle corresponds to the front surface.
Record the micrometer reading.
Rotate the micrometer of the rotation stage until the retroreflected reticle for the back surface.
There maybe the vertical shift of the reticle due to the vertical wedging. Record the vertical shi
Record the micrometer reading. Take a difference from the previous value.
A1: α = 0.68 deg, β = 0 arcmin (0 div)
A2: α = 0.80 deg, β = -6 arcmin (3 div down)
A3: α = 0.635 deg, β = -1.6 arcmin (0.8 div down)
A4: α = 0.650 deg, β = 0 arcmin (0div)
A5: α = 0.655 deg, β = +2.4 arcmin (1.2 div up)
\theta_H = ArcSin[Sin(α) / n]
\theta_V = ArcSin[Sin(β) / n]/2
A1: \theta_H = 0.465 deg, \theta_V = 0.000 deg
A2: \theta_H =
deg, \theta_V = -0.034 deg
A3: \theta_H = 0.434 deg, \theta_V = -0.009 deg
A4: \theta_H = 0.445 deg, \theta_V = 0.000 deg
A5: \theta_H = 0.448 deg, \theta_V = 0.014 deg
Uploaded Tue Feb 5 01:29:33 2013