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Beamage-M² User Manual Revision 6 38
8) To obtain an accurate M
2
measurement, you must add images of the beam from the Far Field
(beyond 2 Rayleigh lengths) and from either side of the waist in the Near Field (within 1 Rayleigh
length). Please, refer to ISO-11146 for more information.
9) Available functions are detailed in section 5. Here is a quick reminder of the available functions
for manual measurement:
a. Distance : Distance between the lens and the camera sensor.
b. Add : Add the current beam diameter to the list.
c. Delete : Remove the selected rows from the list. The rows must be selected before
deleting them.
d. Clear All : Remove all the data from the list.
e. Sort : All beams will be sorted by distance.
f. Calculate M² : M
2
measurements will be done with the current data.
g. Open M² File : Open saved beams from a * .m2geo or *.m2man file.
h. Save All Images and Data : Save all beams from the list to a * .m2geo file.
i. Export M² Data Only : Export all the data to an Excel compatible *.txt file.
10) When a minimum of 5 beams have been entered, you can use the Calculate M² function. A curve
fit will then be available on the M
2
Display window and all M
2
measurement results will be
available in the M
2
Results tab. See section 5.4 for more details about the results.
11) At any time during the process:
a. More beams can be added to the list by using the Add button. When using this function,
all previously added beams will be kept.
b. A beam can be deleted by using the Delete button. The corresponding beam row must
be selected before using this function.
c. New M
2
calculations can be performed by using the Calculate M² button. If a new beam
has been added or deleted, the Calculate M² button must be used to provide the new
result of the M
2
measurement.
12) To retrieve previously saved data, click on the Open M2 File button, in the ribbon. Click on
Calculate to see the M
2
results in the M2 Curve Display and M2 Results tabs.