Difference between revisions of "Optical Tweezers"
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[[Media:Scattering_-_Basics.pdf |Scattering Basics]] (from Michigan Tech)
[[Media:Scattering_-_Basics.pdf |Scattering Basics ]] (from Michigan Tech)
Revision as of 09:02, 23 October 2014
Scattering Basics - Incident Plane Wave (from Michigan Tech)
- Summer 2014 Powerpoint
-  Directions on how to use a QPD in an optical tweezer setup.
-  Here are some slide prepping instructions from Berkeley.
Our own setup
- Slide Setup
- Microscope Slide Mount
- Stokes' Setup
Using NI Vision Assistant
-  Image Acquisition/Saving Images
 How to track the microspheres in NI Vision Assistant using pattern matching.
- We actually tried both using pattern matching and brute force point and click methods. Neither worked very well, so we recommend using the QPD to get position measurements
Our calculations using Brownian Motion
Calculating Trap Forces Using Stokes' Drag Force
-  iPython Calculations
Beam Power (mW) Escape Velocity (microns/second) Trap Force (pN) 5.5 20.57 0.44 8.5 33.49 0.72 11.7 40.00 0.86 15.3 62.60 1.34 19.0 84.71 1.82 23.0 110.77 2.38
- A simple calculation would say that I need a 10 billion watt laser to achieve a 1 Newton trapping force. We should totally do that. The spheres would be so incredibly trapped.
Performing Biological Measurements
- Installing Infared Laser
- Preparing bacteria to Analyze
- Current Progress and Issues