| Scripting Resources for DigitalMicrograph™ |
CCD Temperature Graph |
|
Function |
Sources the dark counts from a CCD camera and plots the effective CCD temperature, and change in temperature on a graph. |
Version |
version:30030606, v3.0 |
Author |
D. R. G. Mitchell |
Acknowledgements |
- |
Comments |
This was used on a JEOL 2010F with a GIF 2001 (1k x 1k camera). The monitoring interval can be set from minutes to hours. |
System Requirements |
Should be compatible with all recent versions of DigitalMicrograph. |
Known Issues |
Microscope type/communication method should not matter too much, as this script talks directly to the camera. If your camera is not 1k x 1k you will need to edit the script to match your camera resolution. Change the lines :
image shortimage= SSCGetDarkReference(0.1, 1, 0, 0, 1024, 1024) image longimage= SSCGetDarkReference(5.1, 1, 0, 0, 1024, 1024)
so that the last pair of integers matches the size of your camera in y and x. The actual temperature value is a cludge - a fit to an exponential, with guessed constants so that the temperature goes from 20°C to about -20°C, which is about typical. Without some form of direct measurement or a knowledge of the camera parameters, this is always guesswork. However, what matters is not so much the CCD temperature but the temperature stability. This script is useful where you are cooling the camera from ambient. You need to know how long before it reaches a steady temperature and you can start using it. Also, if you have water flow or water temperature fluctuations, your camera performance may change. You can monitor these with this script. |
Supported |
Yes. |
Included Files |
Main script file. |
Source Code |
See attached script file. |