Difference: 20161125_MSciSpectroscopyMeeting (5 vs. 6)

Revision 625 Nov 2016 - WilliamBurrows

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META TOPICPARENT name="StewartBoogertSpectroscopy2016"
Focusing the camera
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  • Plot showing sigma as a function of focal length:
    Focallengthplot.png
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  • Standard deviation of the Gaussian fits to the peak as a function of the focal length:
    sigma_focal_length.png
 
  • Obtain $\sigma$ values for different rotation of camera obtained using peak finder
Rotation (mm) 2.00 2.50 3.00 3.21 3.50 4.00 4.50 5.00
Sigma values 3.60381891499 3.63753847945 4.56762848828 3.64517768764 3.60828884108 3.74669667918 3.65238841404 4.74355676159
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Rotation (mm) 2.00 2.50 3.00 3.21 3.50 4.00 4.50 5.00
Sigma values 3.39728720 4.246609001 3.397287201 3.821948101 3.821948101 4.246609001 3.821948101 3.821948101
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>		Peak asymmetry
 
  • Grating is centered on the mount, orientation of the blaze arrow is changed to investigate the asymmetry of the peak shape at different positions across the grating
  • Peak chosen is a bright line in He at a large grating angle (micrometer setting)
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META FILEATTACHMENT attachment="peak_asymmetry_toward.png" attr="" comment="Asymmetry of the peak for different pixel positions, with the blaze arrow pointed towards the camera" date="1480075103" name="peak_asymmetry_toward.png" path="peak_asymmetry_toward.png" size="59235" user="zyvb951" version="1"
META FILEATTACHMENT attachment="asymmetry.py.txt" attr="" comment="Code to display the peak asymmetry" date="1480075804" name="asymmetry.py.txt" path="asymmetry.py.txt" size="1496" user="zyvb951" version="1"
META FILEATTACHMENT attachment="Focallengthplot.png" attr="" comment="Plot of change in sigma against change in focal length" date="1480076637" name="Focallengthplot.png" path="Focallengthplot.png" size="98819" user="zyvb137" version="1"
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META FILEATTACHMENT attachment="sigma_focal_length.png" attr="" comment="Standard deviation of the Gaussian fits to the peak as a function of the focal length" date="1480082147" name="sigma_focal_length.png" path="sigma_focal_length.png" size="26889" user="zyvb951" version="2"
META FILEATTACHMENT attachment="focus_curves.py.txt" attr="" comment="Code to plot standard devtiations as a function of micrometer settings" date="1480082332" name="focus_curves.py.txt" path="focus_curves.py.txt" size="2004" user="zyvb951" version="1"
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