RAYLASE SUPERSCAN II-10 User manual

2-Axis Laser Beam Deflection Units
SUPERSCAN II
-10
SUPERSCAN II
-15 SUPERSCAN II-HS-15
SUPERSCAN II
-15 ENHANCED SUPERSCAN II-HS-15 ENHANCED
SUPERSCAN II
-20 SUPERSCAN II-HS-20
SUPERSCAN II
-30 SUPERSCAN II-HS-30

This manual has been compiled by RAYLASE for its customers and employees.
RAYLASE reserves the right to change the product described in this manual and the infor-
mation contained therein without prior notice.
The software included in the product and this manual itself are protected by copyright. All
rights are reserved. Duplication of this manual in whole or in part, particularly by photocopy-
ing, scanning or imaging, and reproduction by any means are forbidden without the prior, writ-
ten consent of RAYLASE.

Contents
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 3
CONTENTS
1BASIC SAFETY INSTRUCTIONS..................................................................................4
1.1 Laser safety.....................................................................................................................4
1.2 Laser shutter....................................................................................................................4
1.3 Signs................................................................................................................................4
1.4 Classification of laser devices.........................................................................................5
1.5 Laser area .......................................................................................................................6
2BASIC INFORMATION...................................................................................................7
2.1 Introduction......................................................................................................................7
2.2 Package contents............................................................................................................7
2.3 Module overview .............................................................................................................8
2.4 Warranty..........................................................................................................................9
2.5 Manufacturer ...................................................................................................................9
2.6 Customer support............................................................................................................9
2.7 Status LEDs...................................................................................................................10
3TECHNICAL DATA.......................................................................................................11
3.1 Conformity with directives .............................................................................................11
3.2 Rating plate code ..........................................................................................................11
3.2.1 SUPERSCAN II.............................................................................................................11
4FUNCTIONAL DESCRIPTION .....................................................................................12
4.1 Laser beam deflection unit............................................................................................12
4.2 F-Theta lens ..................................................................................................................13
4.3 Analog interface ............................................................................................................14
4.4 Digital interface..............................................................................................................15
4.5 Power supply.................................................................................................................16
5INSTALLATION............................................................................................................17
6CLEANING....................................................................................................................18
6.1 Cleaning the housing.....................................................................................................18
6.2 Cleaning the optical system ..........................................................................................18
6.2.1 Instructions for cleaning lenses and glass guards ........................................................19
6.2.2 Instructions for cleaning mirrors....................................................................................19
6.2.3 Special instructions for zinc selenide optical elements.................................................19
7MAINTENANCE............................................................................................................21
8TROUBLESHOOTING..................................................................................................22
9APPENDIX....................................................................................................................25

Chapter 1 Basic safety instructions
4 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
1 BASIC SAFETY INSTRUCTIONS
1.1 Laser safety
The user is responsible for safe operation and for safeguarding the surrounding area against
hazards that can be caused by laser radiation. OEM customers must ensure compliance with
all local and national regulations.
1.2 Laser shutter
The deflection unit is designed to deflect an input laser beam and output it again.
The deflection unit cannot block or weaken the laser beam. To prevent unwanted emission of
the laser beam, above a particular danger class the laser device must be fitted with a shutter
(page 5, Classification of laser devices).
The laser device must be of sufficient quality that the laser beam can only be emitted at the
beam output on the deflection unit.
1.3 Signs
The following signs must be attached to the deflection unit. These signs may not be removed.
Signs that have become illegible must be replaced.
Rating plate
The rating plate and the identification code printed on it allow
the type of the deflection unit to be determined (
page 11,
Rating
plate code). The serial number and the item number
are also used to identify the deflection unit.
The CE symbol confirms the deflection unit's compliance with
European directives. It indic
ates that the deflection unit is ap-
proved for free trade within the EU.
The seal label warns against unauthorized opening of the de-
flection unit. If the seal is broken, all warranty claims
against
RAYLASE are void.
At the point where laser radiation is emitted, a laser warning
sign
must be attached. It provides information about the type
of radiation, specific hazards and the degree of protection. The
laser warning sign is attached by the
OEM customer in accord-
ance with the laser device's classification (
page 5, Classifi-
cation of laser devices
).

Basic safety instructions Chapter 1
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 5
1.4 Classification of laser devices
The deflection unit can be fitted on various laser devices. Every laser device is assigned to a
particular danger class , which must be specified at the point where laser radiation is emitted,
e.g. using a warning sign. The following classifications are defined in DIN EN 60825-1:
Class
Description
1
The accessible laser radiation is not dangerous under reasonable foreseeable conditions.
1M
The accessible laser radiation is in the wavelength range of 302.5 to 4,000 nm. The accessi-
ble laser radiation is not dangerous to the eyes, as long as the cross-section is not reduced
by optical instruments (magnifying glasses, lenses, telescopes).
2
The accessible laser radiation is in the visible spectrum (400 to 700 nm). Short-term expo-
sure (up to 0.25s) is not dangers to the eyes. Additional radiation components outside the
wavelength range from 400-700 nm meet the requirements for class 1.
2M
The accessible laser radiation is in the visible spectrum from 400 to 700 nm. Short-term ex-
posure (up to 0.25s) is not dangerous to the eyes, as long as the cross-section is not reduced
by optical instruments (magnifying glasses, lenses, telescopes). Additional radiation compo-
nents outside the wavelength range from 400-700 nm meet the requirements for class 1M.
3R
The accessible laser radiation is in a wavelength range of 302.5 to 10,600 nm and is danger-
ous to the eyes. The power or energy is a maximum of five times the limit for permissible
class 2 radiation in the wavelength range from 400 to 700 nm.
3B
The accessible laser radiation is dangerous to the eyes and frequently to the skin.
4
The accessible laser radiation is extremely dangerous to the eyes and dangerous to the skin.
Even diffuse scattered radiation can be dangerous. The laser radiation can cause fires or a
risk of explosion.
Note: Bear in mind that the deflection unit changes the position at which the beam is emitted
and the new beam output must be marked with a warning sign showing the appropriate classi-
fication.
Note: The deflection unit can change the classification of the laser device, particularly if it is
fitted with a focusing lens. The laser device may require additional protective equipment as a
result.

Chapter 1 Basic safety instructions
6 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
1.5 Laser area
For the purposes of accident prevention, the laser area is defined as the area in which the
maximum permitted radiation value can be exceeded. This is generally applicable for class
3B, 3R and 4 lasers. For class 1 to 2M laser devices, a laser area can be produced by focus-
ing the laser beam.
A sufficient beam intensity produces a laser area that covers the entire radiation angle of the
deflection unit and includes the reflection from all objects that can be exposed to the radiation
as a result. Note that even apparently diffuse surfaces can reflect laser radiation and a laser
beam that has been reflected several times can still be dangerous.
The laser area must be indicated by corresponding warning signs or lamps and protected by
appropriate shading and interlock switches.
No flammable or explosive objects or liquids should be located in the laser area.
This operating manual interprets a selection of accident prevention regulations from the point
of view of using laser deflection units in industrial plants. However, the applicable local and
national standards, rules and regulations are binding.
laser
shutter
RAYLASE
deflection unit
cover
reflected laser beam
deflected laser beam
working surface
Laser area

Basic information Chapter 2
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 7
2 BASIC INFORMATION
2.1 Introduction
Chapters 1 to 8 of this operating manual describe the general handling of deflection units from
the following series: SUPERSCAN II and SUPERSCAN II-HS. Appendix A lists the different
features. For details of the type you are using, refer to the rating plate.
This operating manual contains important information on qualified and safe handling of the
deflection unit. You should therefore familiarize yourself with the content of this manual before
using the deflection unit for the first time. In case of any queries, please contact RAYLASE.
The operating manual must be accessible to anyone who will be involved in developing, in-
stalling or using a laser device featuring the RAYLASE deflection unit. If the deflection unit is
sold on, this operating manual or an authorized copy must be passed on with it.
2.2 Package contents
Standard:
Deflection unit
Optional:
F-Theta lens, glass guard
Control card
Connecting cable between control card and deflection unit
Software package

Chapter 2 Basic information
8 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
2.3 Module overview
The illustration below shows three typical laser devices that are realized using RAYLASE and
customer-specific modules (indicated by dotted lines).
RAYLASESP-ICEcontrolcard
or
RAYLASE RLC-PCIcontrolcard
PC
DriverforRAYLASEcontrol cards
Software:
RAYLASEweldMARK™
or
customer-specific software
Powersupply
RAYLASE
Deflection unit
Lasersystem
RAYLASE
RLC-USB unit
PC
USB port
Driver for RAYLASE control cards
Software:
RAYLASEweldMARK™
or
customer-specific software
Power supply
RAYLASE
Deflection unit
Laser system
RS232
Driver for RAYLASE control cards
Software:
RAYLASE weldMARK™
or
customer-specific software
PC
RAYLASE
SP-ICE control card
Power supply
Stand-alone hardware RAYLASE
Deflection unit
Laser system
Fig. 1
Module overview

Basic information Chapter 2
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 9
2.4 Warranty
The rights of the customer in respect of any defects in quality or deficiencies in title are gov-
erned by the general conditions of business of RAYLASE AG. These conditions are available
for review on our website.
Before returning the product, please request an authorization number from RAYLASE. Pack
the product in the original packaging or in packaging that provides equivalent protection for
shipping.
RAYLASE shall not be obliged to repair defects under the following circumstances:
If persons not authorized by RAYLASE have attempted to repair the product.
If persons not authorized by RAYLASE have modified the product.
If the product has been used improperly.
If the product has been connected to incompatible devices.
If the product has been damaged because of inadmissible high laser power or focusing the
laser on optical areas.
If the product has been damaged because of unqualified cleaning of the optical areas.
If the warranty period is expired.
Note: No implicit guarantee or warranty of suitability for specific purposes has been made.
RAYLASE is not responsible for damages arising from use of the product. Individual assem-
blies or other assemblies manufactured by RAYLASE may be subject to separate warranty
conditions. Refer to the corresponding manuals for further information.
2.5 Manufacturer
RAYLASE AG
Argelsrieder Feld 2+4
82234 Wessling
Germany
Tel.: [phone] - 88 98 - 0
Fax: [phone] - 88 98 - 10
http://www.raylase.de
E-mail: [e-mail]
2.6 Customer support
The RAYLASE support services are available for your problems either in respect to the deflec-
tion unit or this manual. Before calling for support, please make sure you refer to any
appropriate sections in the manuals on the supplied CD that may answer your questions.
If you need further assistance call RAYLASE customer service department, Monday through
Friday between 8 A.M. and 5 P.M. (Middle European Time).
The customer service personnel will be able to give you direct assistance and answers to your
questions.
Germany (Wessling)
+49 (0) 81 53 - 88 98 – 0
E-Mail: [e-mail]
... ask for the customer service department

Chapter 2 Basic information
10 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
2.7 Status LEDs
The status LEDs allow you to check important functions and statuses on the deflection unit.
They are located on the front or on the top of the deflection unit (depends on type).
LED arrangement
Name
Color
Meaning
D1
Red
CLK fault
Data transmission faulty.
Cable defective.
D2
Red
Parity fault X
D3
Red
Parity fault Y
D4
Green
Temp. status X
Temperature status available if
LEDs are lit.
D5
Green
Temp. status Y
D6
Orange
New data X
Transfer new data if status
LEDs are lit.
D7
Orange
New data Y
D8
Red
Fault X
Galvanometer scanner or
driver electronics defective.
Power supply defective if sta-
tus LEDs are flickering.
D9 Red Fault Y
D10
Green
+VCC
Power supplies available if
LEDs are lit.
D11
Green
-VCC

Technical data Chapter 3
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 11
3 TECHNICAL DATA
This section outlines the common features of all deflection units. For type-specific features,
refer to the data sheets in the Appendix. The individual data is assigned by the rating plate on
the deflection unit and by the identification code (below, Rating plate code).
3.1 Conformity with directives
The deflection unit conforms to the requirements of the following directives:
EU Directive 2004/108/EG or German law on electromagnetic compatibility (EMVG)
EU Directive 2002/95/EC or German law on electrical equipment (ElektroG)
Directive 2006/42/EC on machinery
For details of conformity with other directives, contact RAYLASE.
3.2 Rating plate code
The type designation on the rating plate allows you to assign the deflection unit to the appro-
priate data sheet in the Appendix. The data sheet contains the specific data for the unit.
3.2.1 SUPERSCAN II
The following key is used on the label of SUPERSCAN II series.
Type designation
SS-II SUPERSCAN II
SS-II-LD SUPERSCAN II Low Drift
SS-II-AC SUPERSCAN II Auto Calibration
SS-II-HS SUPERSCAN II High Speed
SS-II-HS-LD SUPERSCAN II High Speed, Low Drift
SS-II-HS-AC SUPERSCAN II High Speed, Auto Calibration
SS-IIE-LD SUPERSCAN II Enhanced Low Drift
SS-IIE-HS SUPERSCAN II Enhanced High Speed
SS-IIE-HS-LD SUPERSCAN II Enhanced High Speed, Low Drift
│
│ Apertur [mm]
│ │
│ │ Coating code Wavelength [nm] ............. Laser
│ │ AL 180-700 ...................... UV laser
│ │ TY 355 .......................... Nd: YAG tripled
│ │ AG 400-1064 ..................... various
│ │ AR 488-514 ...................... Argon ions
│ │ DY 532 .......................... Nd: YAG doubled
│ │ DY+Y 532 & 1064 ................... various
│ │ 780-980nm 780-980 ...................... LEDs
│ │ Y+(850-870) 850-870 & 1064 ............... Nd:YAG
│ │ 915+975nm 915 & 975 .................... LEDs
│ │ 975 975 .......................... LEDs
│ │ Y 1064 ......................... Nd:YAG
│ │ AU 10600 ........................ CO2
│ │ C 10600 ........................ CO2
│ │ │
│ │ │ Tuning/Version
│ │ │ LN Low noise Tuning
│ │ │ W Short acceleration time tuning
│ │ │ Vx Version
│ │ │ │
│ │ │ │ Interface type
│ │ │ │ Dig1 Digital interface with 25-pin D-SUB connector
│ │ │ │ Dig2 Digital interface with 9-pin and 25-pin D-SUB connector
│ │ │ │ An2 Analog interface
│ │ │ │ │
│ │ │ │ │ Additional or customer code
└─ └─ └─ └─ └─ └
XX-XX[XX]XX XX/X
Note: In addition to the coatings listed above, all mirrors have a deflection coating for a wave-
length of 633nm.

Chapter 4 Functional description
12 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
Fig. 2
Functional
princi
ple
4 FUNCTIONAL DESCRIPTION
4.1 Laser beam deflection unit
The deflection unit can be used to deflect a laser beam in X and Y directions. This produces
an area within which a laser can be directed at any position. This area is known as the "mark-
ing field" and is shown in Fig. 2. Deflection is performed by two mirrors, each of which is
moved by a galvanometer scanner. The deflection unit has a beam input, into which the laser
beam is fed, and a beam output, through which the laser beam is emitted from the unit after
deflection. Only suitable lasers can be fed into the beam input. Refer to the corresponding
data sheet in the Appendix for details. Depending on the version, the beam output is either
open or fitted with an F-Theta lens or glass guard (page 13, F-Theta lens).
1 Digital interface of deflection unit
2 Power supply of subsystem
3 Beam input
4 Beam output
5 Operating field
6 Status LEDs
7 Galvanometer scanners with
mirrors
Only for deflection units with water cooling
8 Input coolant
9 Output coolant

Functional description Chapter 4
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 13
Only for deflection units fitted with an F-Theta lens
4.2 F-Theta lens
The F-Theta lens is specially designed for use with 2-axis deflection units. It focuses the laser
beam at optimum quality on any position in the marking field. At the same time, it provides
partial optical compensation for the barrel-shaped distortion that is unavoidable when using a
two-axis deflection unit. The remaining distortion (see below) must be compensated by the
deflection unit drive.
Distortion caused by two-mirror
deflection.
Distortion caused by F-Theta
lens.
Distortion caused by two-
mirror deflection. and F-Theta
lens.
1 Lens element inc. lens
2 Glass guard
3 Clamp ring
4 Protective cap
Assembly instructions
oBefore installation, check the protection window for dirt, scratches or cracks.
- If the protection window is dirty, it must be cleaned (page 19, Instructions for
cleaning lenses and glass guards).
- If the protection window is scratched or cracked, it must be replaced.
oBrush the outer thread of the protective glass with a small amount of special grease for
photo-mechanical components. Normal fats are not suitable because they release gases
and thus the optical system can be destroyed.
oScrew the protection window and mount into the beam output on the deflection unit until it
is positioned securely.
Fig. 3
Field distortion
with and without
F-Theta lens
Fig. 4
Example: F-
Theta lens for
Nd:YAG

Chapter 4 Functional description
14 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
For deflection units with analog interface only
4.3 Analog interface
The terminal assignment of the analog interface is outlined below. To determine whether the
deflection unit is fitted with an analog or a digital interface, refer to the code on the rating plate
(page 11, Rating plate code).
J1
PIN
Signal
PIN
Signal
1
13
25
14
25 PIN D-SUB
1
GND
14
-Y Command
2
GND
15
+Y Command
3
GND
16
Y Position
4
GND
17
/Y Temp ok
5
/Y Ready
18
Y Pos Error
6
GND
19
Y Velocity
7
GND
20
-X Command
8
GND
21
+X Command
9
GND
22
X Position
10
GND
23
/X Temp ok
11
/X Ready
24
/X Pos Error
12
GND
25
X Velocity
13
GND
---
---
To prevent faults, shielded cables should be used and signals must be input as shown below.
Fig. 5
Signal input

Functional description Chapter 4
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 15
For deflection units with digital interface only
4.4 Digital interface
The deflection unit is connected to a RAYLASE control card using the 25-pin D-SUB connect-
or. All signals are compatible with RAYLASE's extended function XY2-100 standard.
If the deflection unit is also fitted with a 9-pin D-SUB connector, the power supply to the de-
flection unit comes from this additional connector. Deflection units that are not fitted with a 9-
pin D-SUB connector are powered by the digital interface. Refer to the following connection
table:
J1
PIN
Signal
PIN
Signal
1
13
25
14
25 PIN D-SUB
1
I
-SENDCLOCK
14
I
+SENDCLOCK
2
I
-SYNC
15
I
+SYNC
3
I
-X CHANNEL
16
I
+X CHANNEL
4
I
-Y CHANNEL
17
I
+Y CHANNEL
5
I
-Z CHANNEL
18
I
+Z CHANNEL
6
O
-HEAD-STATUS
19
O
+HEAD-STATUS
7
I
-P-DAC CHANNEL
20
I
+P-DAC CHANNEL
8
nc
21
nc
9
Nc1
+VSS1
22
nc1
+VSS1
10
nc1
+VSS1
23
GND
11
GND
24
GND
12
nc1
-VSS1
25
nc1
-VSS1
13
nc1
-VSS1
---
---
I= Diff. Input, nc = Not connected (not used) O = Diff. Output
1) If there is no separate 9-pin D-SUB power input, the power supply is provided by the digital interface.
The power supply must be provided by the OEM customer.
Specifications
Diff. Input-, Diff. Input+
-
Diff. Output-, Diff. Output+
Input voltage
max. ±24.0V
Output low
max. 0.6V
max. 40mA
Input threshold
200mV
Output high
min. 2V @ 50Ω
max. 40mA
Hysteresis
typ. 45mV
ESD protection
±10kV
Input impedance
120Ω
ESD protection
±15kV
Power supply
Designation
Voltage
Current
Residual rip-
ple
Noise
-VSS
-15V to -18V
2.5A
≤100mV
≤0.5% DC at
30MHz
+VSS
+15V to +18V
2.5A

Chapter 4 Functional description
16 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
For deflection units with 9-pin D-SUB connector only
4.5 Power supply
The 9-pin D-SUB connector provides the deflection unit with power. The power supply must
be provided by the OEM customer. Refer to the following connection and parameter table:
J1
PIN
Des-
igna-
tion
Voltage
Current
Residual rip-
ple
Noise
6
1
5
9
9 PIN D-SUB
1, 2, 6
-VSS
-15V to -18V
min. 2.5A
≤100mV
≤0.5% DC at
30MHz
4, 5, 9
+VSS
+15V to +18V
min. 2.5A
3, 7, 8
GND

Installation Chapter 5
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 17
5 INSTALLATION
Warning:

The laser beam can cause severe injury to the eyes and the skin. Note that
even apparently matt objects can reflect the wavelength of laser beams. All
personnel in the room must wear appropriate laser protection goggles and, if
necessary, protective clothing.

Never look directly at the laser beam, even when wearing protective gog-
gles.

The deflection unit may require the laser device to be assigned to a different
danger class (page 5, Classification of laser devices).

The laser must be switched off during installation.

We recommend that the laser area is completely protected by an appropri-
ate working chamber. If this is not possible, appropriate protective measures
for the laser class must be implemented.

The mirrors in the deflection unit must move freely after installation of the
deflection unit. No components of the laser device may protrude into the de-
flection unit.

The laser device must be of sufficient quality that the laser beam can only be
emitted at the beam output on the deflection unit.

The "Laser radiation" national accident prevention regulations must be ob-
served.

Connecting cables may not be subjected to mechanical strain.

The deflection unit must be protected against moisture, dust and corrosive
vapors.

The optical components may only be touched when wearing suitable cotton
gloves.

The deflection unit must be protected against static discharge and strong
electromagnetic fields.

The power density of the input laser radiation may not exceed the maximum
permissible power density of the optical components of the deflection unit.

The beam path and the function of the deflection unit must be tested after
installation.
We recommend performing all tests with a danger class 1 or 2 laser to min-
imize the risk of injury. If this is not possible, the laser used must be set to
the lowest possible power. This setting must be secured against accidental
adjustment.
Procedure
oCarefully remove the protective cover over the beam input with a small screwdriver.
oTo install the deflection unit, insert locating pins into the corresponding holes and attach
the deflection unit to the prepared installation surface using screws.
Note: The deflection unit may only be installed using the pins and screws specified by
RAYLASE. Follow the installation drawing supplied.
oFor details of how to connect the deflection unit to a RAYLASE control card, refer to the
corresponding manual.

Chapter 6 Cleaning
18 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
6 CLEANING
6.1 Cleaning the housing
Warning:
The laser beam can cause se
vere injury to the eyes and the skin. Before clean-
ing, make sure that the laser device is switched off and secured against acc
i-
dentally being switched on.
The deflection unit housing is dust proof. It can be cleaned with a duster. If it is very dirty, the
duster can be moistened with a light and non-aggressive cleaning solution (e.g. soap solu-
tion).
6.2 Cleaning the optical system
Warning:
The laser beam can cause severe injury to the eye
s and the skin. Before clean-
ing, make sure that the laser device is switched off and secured against acc
i-
dentally being switched on.
Dirty optical surfaces result in increased absorption of the laser radiation. This can cause the
dirt to heat up sufficiently for it to burn into the optical surfaces and permanently damage
them.
The following circumstances can cause increased accumulation of dirt:
The ambient atmosphere is contaminated with dirt, grease or other particles.
Vapors and particles are produced while working.
Talking, coughing or sneezing close to optical surfaces.
In general, all contamination of the optical system should be avoided wherever possible.
However, as contamination cannot be completely avoided, the optical system must be
cleaned at appropriate intervals. Regular checking and cleaning of the optical surfaces can
prevent permanent damage.
Note: RAYLASE accepts no liability for damaged optical components!
Note: Damage caused during the laser process, e.g. when processing metals, is irreversible
and cannot be resolved by cleaning.

Cleaning Chapter 6
MN051_v1.0.5 2-Axis Laser Beam Deflection Units 19
For deflection units with lens and glass guard only
6.2.1 Instructions for cleaning lenses and glass guards
Warning:
The laser beam can cause se
vere injury to the eyes and the skin. Before clean-
ing, make sure that the laser device is switched off and secured against acc
i-
dentally being switched on.
Fingerprints contain aggressive substances that can damage the optical surfaces. Optical
surfaces should therefore only be touched when wearing suitable gloves or with a lens clean-
ing cloth.
oOnly touch the optical elements when wearing suitable cotton gloves and only touch the
edges.
oBlow loose particles from the surface with clean and oil-free compressed air. Note that the
compressed air in workshops can contain oil particles and is therefore unsuitable for clean-
ing the optical system.
oMoisten a suitable lens cleaning cloth with ethanol suitable for cleaning optical compo-
nents.
oPlace one end of the moistened cloth on the optical system and slowly move it over the
optical components. Do not exert any pressure and do not rub the optical components.
oRemove any remaining ethanol residue with a dry optical cloth.
oRepeat the procedure until the surface is completely clean. Use a new cleaning cloth for
each repetition.
6.2.2 Instructions for cleaning mirrors
Warning:
The laser beam can cause severe injury to the eyes and the skin. Before clea
n-
in
g, make sure that the laser device is switched off and secured against acci-
dentally being switched on.
The mirror surfaces are extremely sensitive and may only be cleaned by experienced person-
nel. We strongly recommend sending the deflection unit in to RAYLASE for the mirrors to be
cleaned, as opening of the deflection unit by unauthorized personnel voids the warranty.
However, if you do want to clean the mirrors yourself, follow the same procedure as for clean-
ing the lens but with even more care (above, Instructions for cleaning lenses and glass
guards).
6.2.3 Special instructions for zinc selenide optical elements
Zinc selenide (ZnSe) is an inorganic orange material that can be used in different forms as an
optical component (e.g. lenses, beam splitters, mirrors) in CO2laser systems.
Properties of zinc selenide
Melting point 1,520°C
Density 5.27g/cm³ at 25°C
Solubility Sensitive to water
To improve the optical properties of the material, zinc selenide is often given an anti-reflex
coating that can contain thorium fluoride. Thorium is a α emitter and is slightly radioactive.
Thorium is potentially hazardous to health if it is inhaled or swallowed. As the coating contain-

Chapter 6 Cleaning
20 RAYLASE 2-Axis Laser Beam Deflection Units MN051_v1.0.5
ing thorium is enclosed between non-radioactive layers, there is no risk to the user under
normal circumstances.
Damage to zinc selenide optical elements
Under normal circumstances, no special precautions are necessary when handling or storing
zinc selenide.
In case of damage to a zinc selenide optical element or its anti-reflex coating, follow the in-
structions below.
Damage to anti-reflex coating
Possible causes:
- Coating coming into contact with water, acids or alkalis
- Mechanical damage due to improper cleaning or handling
Action:
- Pack the optical elements in an airtight sealed plastic container.
- Return the container to your supplier. The supplier is responsible for professional
disposal of the material.
Damage to optical element
Possible causes:
- Contact with water, acid or alkali
- Mechanical damage due to improper cleaning or handling
Action:
- Avoid inhaling dust!
- Carefully collect up fragments and pack them in an airtight sealed plastic container.
- Return the container to your supplier. The supplier is responsible for professional
disposal of the material.
Damage to optical element due to laser radiation
Cause:
- Damage to optical element due to laser radiation (laser radiation is no longer
completely transmitted but is absorbed into the element due to damage to the anti-
reflex coating or contamination of the optical element)
Action:
- Switch off the laser device immediately!
- Leave the room for at least 30 minutes!
- Wear gloves and a mouth protector while performing the subsequent steps!
- Carefully collect up all fragments and pack them in an airtight sealed plastic container.
- Clean all contaminated components and surfaces with a damp cloth and pack the
cleaning cloths in a sealed plastic container.
- Return the containers to your supplier. The supplier is responsible for professional
disposal of the material.
Warning: Because of the risks outlined, zinc selenide optical elements must be cleaned with
special care and is performed entirely at your own risk!