Difference between revisions of "Optical Tweezers"

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   <li>
 
   <li>
 
<table>
 
<table>
<th>
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<th>Beam Power (mW)</th>
    Beam Power (mW)
+
<th>Escape Velocity (microns/second)</th>
</th>
+
<th>Trap Force (pN)</th>
<th>
 
    Escape Velocity (microns/second)
 
</th>
 
<th>
 
    Trap Force (pN)
 
</th>
 
 
<tr>
 
<tr>
 
     <td>5.5</td>
 
     <td>5.5</td>

Revision as of 18:03, 28 May 2014

Optical Tweezers

Resources

  • [1] Directions on how to use a QPD in an optical tweezer setup.
  • [2] Here are some slide prepping instructions from Berkeley.

Our own setup

Using NI Vision Assistant

  • [3] Image Acquisition/Saving Images
  • [4] How to track the microspheres in NI Vision Assistant using pattern matching.

Our calculations using Brownian Motion

  • 2.56 micrometer spheres
    • 4.6 mW Beam [5]

Calculating Trap Forces Using Stokes' Drag Force

  • Beam Power (mW) Escape Velocity (microns/second) Trap Force (pN)
    5.5 20.57 0.88
    8.5 33.49 1.44
    11.7 40.00 1.72
    15.3 62.60 2.69
    19.0 84.71 3.64
    23.0 110.77 4.76
  • []