196
edits
Changes
Jump to navigation
Jump to search
Line 49:
Line 49: − + Line 65:
Line 65: − + + + + + + + + + + +
Construction of a Tabletop Michelson Interferometer (view source)
Revision as of 08:03, 17 December 2009
, 08:03, 17 December 2009no edit summary
===Images of Set-up ===
===Images of Set-up ===
The fllowing are images of the complete Michelson set-up
Now, let us assume that only about 5% of 1 mW laser light reaches the sensor due to cleanup in the beam expander and the light transmitted through the diamond. If the light is expanded to a 2 cm diameter beam, the beam at the sensor is rated at 1.6×10<sup>-8</sup> W·m<sup>2</sup>
Now, let us assume that only about 5% of 1 mW laser light reaches the sensor due to cleanup in the beam expander and the light transmitted through the diamond. If the light is expanded to a 2 cm diameter beam, the beam at the sensor is rated at 1.6×10<sup>-8</sup> W·m<sup>2</sup>
The two order of magnitude shortfall means that very little of the dynamic range of the sensor will be used, leading to a low signal to noise ratio. '''Increasing the specification of the laser to 5 mW may be called for as a result.'''
The two order of magnitude shortfall means that very little of the dynamic range of the sensor will be used, leading to a low signal to noise ratio. For this reason, a 5mW laser was chosen over a 1mW.
* [[Huygens Principle for a Planar Source|Determining the angle of the diffraction minimum for a circular aperture]]
* [[Huygens Principle for a Planar Source|Determining the angle of the diffraction minimum for a circular aperture]]
== Camera Calibration ==
Analysis of videos taken of the vibraton of the diamond waffer can lead to information about both the frequency and the apmlitude of vibration. To perform simultaneous measurments of both parameters, a precise camera calibration was necessary.
=== Calibration Set-Up ===
The following is an image of the device sed or the camera caibration:
IMAGE OF CALIBRATION DEVICE
The cameara was mounted at one end of a 1.40m long rod. The ro was free to rotate about a pivot locaed opposite to the camera. Above the pivot
* [[Interferograms]]
* [[Interferograms]]
* [[Analysis of heat equation for diamond mounting]]
* [[Analysis of heat equation for diamond mounting]]