Difference: 2015SpanStyle=Background-color:Transparent1030_MSciSpectrocopyLab (1 vs. 2)

Revision 230 Oct 2015 - AshleaKemp

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2015"
Data Taking with Other Lamps
Changed:
<
<
  • Swapped the Cadmium lamp for Low Mercury lamp.
  • Low mercury - exposure time 0.2s, took 25 frames starting at 0mm to 12mm, focus distance 19.9mm, camera angle 4.6mm.
>
>
  • Camera Setup
    • camera temp = 5 deg
    • Focus distance = 19.9mm
    • Camera Angle = 4.6mm
  • Low Mercury
    • Exposure 0.2s
    • Micrometer position 0-12mm in 0.5mm intervals
    • Changed exposure to 0.3s
 
  • Towards edges of the frames, the spectral lines appeared to be a little out of focus in comparison to the centre.
Changed:
<
<
  • Repeated process: took 25 frames from 0mm to 12mm, changed exposure time to 0.3s, focus and camera angle same.
  • Swapped to Helium lamp.
  • Helium - took 25 frames from 0mm to 12mm, exposure time 0.3, focus and camera angle same.
  • Swapped to high mercury lamp.
  • High mercury - took 25 frames from 0mm to 12mm,
>
>
  • Helium
    • Exposure = 0.3s
    • Micrometer position 0-12mm at 0.5mm intervals
  • High Mercury
    • Exposure = 0.001s (small as possible)
    • Increased distance of lamp from optical fibre as images satuated
    • Some lines still saturated
    • Micrometer position 0-12mm at 0.5mm intervals
  • Cadmium
    • Exposure = 0.5s
    • frames taken at 0.5mm intervals between 0 and 12mm.

 -- AshleaKemp - 30 Oct 2015
Added:
>
>
META FILEATTACHMENT attachment="20151030_JB_AK.zip" attr="h" comment="" date="1446218833" name="20151030_JB_AK.zip" path="20151030_JB_AK.zip" size="38305454" user="zxap013" version="1"

Revision 130 Oct 2015 - AshleaKemp

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="StewartBoogertSpectroscopy2015"
Data Taking with Other Lamps

  • Swapped the Cadmium lamp for Low Mercury lamp.
  • Low mercury - exposure time 0.2s, took 25 frames starting at 0mm to 12mm, focus distance 19.9mm, camera angle 4.6mm.
  • Towards edges of the frames, the spectral lines appeared to be a little out of focus in comparison to the centre.
  • Repeated process: took 25 frames from 0mm to 12mm, changed exposure time to 0.3s, focus and camera angle same.
  • Swapped to Helium lamp.
  • Helium - took 25 frames from 0mm to 12mm, exposure time 0.3, focus and camera angle same.
  • Swapped to high mercury lamp.
  • High mercury - took 25 frames from 0mm to 12mm,
-- AshleaKemp - 30 Oct 2015
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2021 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding RHUL Physics Department TWiki? Send feedback