103
Revision 00 EN - 01/2021
HP-MSM-HB
35,0(6
23.2.5
Further radius definitions (option)
Not all measuring devices for the laser beam diagnosis come to the same measuring result when carry-
ing out similar measurements with the same laser beam. Apart from a different validation of the measuring
devices the measuring procedures and the used evaluation algorithms have an influence on the determined
beam dimension.
Not all the processes used comply with the valid standards. However, they are the preferred choice for in-
stance in the scientific area. For practical reasons, for instance for the design of the orifices or for the correla-
tion with processing results, it can also be helpful to use alternative beam radius definitions.
As an option, we offer an extension to the following alternative radius definitions:
1. Knife edge method according to ISO 11146-3
2. Slit method according to ISO 11146-3
3. Gaussfit method
4. 1/e² power density loss method
5. Power inclusion method with a freely definable 1
st
power value
6. Power inclusion method with a freely definable 2
nd
power value
2. Moments
Power inclusion
Knife edge method
Slit method
Gaussfit method
1/e²-power density
Fig. 23.5:
Schematic illustration of the beam radius definitions that are offered optionally for the PRIMES
LaserDiagnosticsSoftware LDS
