Start-Up And Operation; Checking The Installation; Checking The Laser Parameters - Scanlab hurrySCAN 10 Installation & Operation Manual

5

Start-up and Operation

5.1 Checking the Installation

Before operating the scan head, carefully check the
following:
Were the mechanical installation and electrical
wiring fully and correctly carried out as described
in "Installation" on page
Are all optical components clean and free of
dust? If necessary, clean the optical components
as described in "Routine Maintenance of the
Optical Surfaces" on page
®
hurrySCAN 10, digital, 1064 nm, f = 254 mm
Rev. 2.6 e
5 Start-up and Operation
16?
31.
5.2 Checking the Laser Param-
eters
The scan head's deflection mirrors and objective are
designed for a laser beam with defined parameters.
Compare the technical specifications on
with the requirements of your application. For
information on tolerances and deviations, please
contact SCANLAB.
Verify that the input beam wavelength, the input
beam diameter and the maximum laser power are
compatible with the specifications of the scan
head.
Caution!
• The mirror coatings are designed for a laser
wavelength of 1064 nm.
• The AR coating of the objective is designed for a
laser wavelength of 1064 nm.
• The maximum allowed average laser power is
150 W. The laser power density applied to the
mirrors must not exceed the value of 500 W/cm
continuous wave. The damage threshold value
for pulsed operation is 5 J/cm
length of 10 ns and 200 pulses)
• The beam diameter at the entrance of the scan
head must not exceed 10 mm.
The values specified for the maximum laser power
rating and the laser damage threshold only apply to
the scan mirrors. They do not apply to the scan objec-
tive or other components. Typically, however, the
damage thresholds of scan objectives are similar to
that of scan mirrors.
Also be aware that additional optical components in
the optical beam path can focus a part of the laser
beam onto the mirror and thereby dramatically lower
the effective damage threshold. For instance, the
lenses or protective window of a scan objective –
though coated with an antireflex coating – always
reflect a certain fraction of the laser light. If the lenses
are shaped such that the reflected laser light is
focused onto the scan mirrors, the power density
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2
2
(for a pulse
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