Graphs | Data | Data Interpretation
This script graphs focus error versus lens position. It is used to check the linearity of the range finder and to calibrate errorcal (see Note 3 ).
Note: Your system must be properly configured before running this script. See notes for more information.
FErrvLPosn.ps: This graph shows error reading, in raw units, versus lens position, in microns.
There is one output file, FErrvLPos_data.txt. The two columns are lpos in microns and error reading.
The resulting graph should be reasonably straight, without too many wobbles and wiggles. The quality of fit, r, specified in the bottom left corner of the graph, should be at least 0.9995. The value of errorcal, shown in the lower left corner of the graph, should be 155 +/-30.