Swatch Lasag SLS 200 CL Series, Service Instructions Manual

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I N D U S T R I A L - L A S E R S
A COMPANY OF THE
Service instructions
Laser sources
5 Technical data of the beam guidance
with fiber optic cables
© Lasag AG, Thun, 26.02.08 CM
86 . 0621 - 05 - 02
5.1 Introduction
5.1.1 Selection procedure
For the definition of the modules for a specific process, the following steps are proposed for the beam
guiding system. Several loops might be necessary.
Step 1 Define the required optical spot size to reach the required process result.
Step 2 Decide which type of head is the best for your system requirements.
Step 3 Select the process heads, which give you the required spots. This will also define the fiber
type.
Step 4 Given the Fiber and the laser parameters of the process, select the laser source.
5.1.2 Difference between fibers with NA 0.22 and NA 0.11
The Numerical Aperture NA of the Fiber is defined as:
NA = sin
(Θ
)
with
Θ as half angle under which the light can
enter the fiber and be transmited without any
losses
.
Max.
acceptance full angle of a
NA 0.22
fiber optic = 25.4°
half angle = 12.7°
Max. beam parameter product of the fiber out-
put
= 22 mm.mrad for 200 µm fiber
Max. acceptance full angle of a NA 0.11
fiber optic
= 12.6°
half angle = 6.3°
Max. beam parameter product of the fiber out-
put
= 11 mm.mrad for 200 µm fiber
The beam quality of a NA 0.11 beam, e.g. as measured by the beam parameter product, is twice that of a
NA 0.22 beam for the same fiber diameter, therefore the maximum average power of a NA 0.11 laser
source is reduced compared to one of NA 0.22.
The laser beam entering the fiber must fit inside the angle of the NA of the fiber used, i.e. the angle of the
beam must be equal or smaller than the acceptance angle of the fiber. The same holds true for the beam
entering the process head: It is therefore necessary to match the NA of laser, fiber and head.
Abweichungen für Masse ohne
Toleranzangaben
bis 30 mm
± 0,1 mm
über 30 mm bis 120 mm
± 0,15 mm
über 120 mm bis 315 mm
± 0,2 mm
über 315 mm bis 1000 mm
± 0,3 mm
über 1000 mm bis 2000 mm
± 0,5 mm
The Copyright for all of the drawings and related appendages, wich have been handed over to the recipient personally
, remain vested in our company at all times.
The same may not be
copied or replicated in any way in whole or in part without our prior consent in writing. Furthermore, they may not be made available or otherwise disclosed to any third party
.
© LASAG L
TD,
Thun
Das Urheberrecht an diesen Zeichnungen und allen Beilagen, die dem Empfänger persönlich anvertraut sind, verbleibt jederzeit unserer Firma. Ohne schriftliche Genehmigung dürfen sie nicht kopiert, vervielfältigt, auch niemals dritten Personen mitgeteilt oder zugänglich gemacht werden. © LASAG
AG,
Thun
Blatt Dok
Bearbeitung Oberfläche
Therm. Behandlung
Ersetzt durch Änderungen
Werkstoff
c
g
b
f
a
e
Ersatz für
d
h
Masstab
Freigegeben
Geprüft
Gezeichnet
Gewinde 6H/6g
Kanten ohne Angaben
0,2-0,3 mm brechen
DS
I N D U S T R I A L - L A S E R S
Artikelnummer
1:1
wird verwendet für
Datei Typ: ai
86.0620 05 01
30.10.07 CM
00-00-00
00.00.07 CM
Serviceanleitung Kapitel 5 Pictures
86.0620 05 02.indd
Lichtleiter
Max. Akzeptanzwinkel
Θ
des LL NA 0.22
Lichtleiter
Max. Akzeptanzwinkel
Θ
des LL NA 0.11
Laserstrahl