Difference between revisions of "Spring 2012:Vincent Lee Lab 2"
From Course Wiki
Vincent Lee (Talk | contribs) |
Vincent Lee (Talk | contribs) (→Actual PSF) |
||
Line 39: | Line 39: | ||
* Disable Sleep | * Disable Sleep | ||
* Run PSF Scan from PSF GUI | * Run PSF Scan from PSF GUI | ||
− | * Open imageJ with 'deconvolution' plugin | + | * Open in imageJ with 'deconvolution' plugin |
+ | |||
=== Theoretical PSF === | === Theoretical PSF === | ||
== Results == | == Results == |
Revision as of 22:47, 9 May 2012
Contents
Objectives
- Building a fluorescence microscope, tuning
- Learning how optical components like those from ThorLabs come together and work.
- Learning about stepper control in a lab setting
- Learning about 3-dimensional deconvolution and looking at the differences in image reconstruction for the actual and theoretical PSF.
Materials
Microscope
- Epi-fluorescence Microscope[1] with parts from Thorlabs
Drivers
- Pololu A4983 Stepper Motor Driver Carrier with Voltage Regulators[2]
- Thorlabs 8 mm Travel Stepper Motor Actuator[3]
Processing
- Matlab
- Matlab Image Acquisition Toolbox[4]
- Matlab Allied Vision Technologies Adaptor[5]
- National Instruments USB Data Acquisition[6]
- ImageJ[7]
- ImageJ plugins: Deconvolution Lab[8] and Diffraction PSF 3D[9]. Manually save in the plugins folder in ImageJ.
Subject
- Submicron beads, small enough to be considered point sources
Microscope
The microscope built was an epi-fluorescence microscope which used a green laser for fluorescence. The stage was designed to be controlled by microstepper motors such that the 3D PSF could be obtained through scanning the z-axis of a sample.
File:DNE.png
Figure 2. Design of epi-fluorescence microscope
Safety
Since a moderately high-power laser was being used, safety precautions were taken:
- An ND filter was used during laser alignment and while the apparatus was being built
- When laser was turned on for actual measurements, the ND filter was removed and 532nm protective laser goggles were worn by all in the vicinity.
Laser Alignment
- The laser could be aligned using two 2-degrees tunable mirrors, allowing both angle and position of the beam to be controlled.
Data Acquisition
Actual PSF
- Open PSF GUI
- Enable Sleep
- Manually focus on fluorescent beads
- Disable Sleep
- Run PSF Scan from PSF GUI
- Open in imageJ with 'deconvolution' plugin
Theoretical PSF
Results
Code
Leanna wrote the code, I defer to what she has said about it.
Cite error: <ref>
tags exist, but no <references/>
tag was found