Laser Shutter Installation - Nutfield Technology XLR8 Manual

Nutfield Technology
The Nutfield Technology X/Y Scan Heads provide the ability to aim the laser beam over a
roughly pyramidal volume. The divergence of the focused beam beyond the focal point, which
is a function of the lenses selected and their positions, can cause radiation to exit the pyramid.
When analyzing safety, you must consider all regions within this aiming pyramid, the divergent
CAUTION
beam, and the effects of all focal possibilities in the zone of hazard. Reflections must also be
considered.

3.1 Laser Shutter Installation

REMINDER
The laser attenuator (shutter) is not included with the X/Y Scan Head. Because each laser is
unique, it is the user's responsibility to insure that such a device is incorporated in the
installation in conformance with CFR regulations (1040.10[f][6]), which reads as follows:
A beam attenuator is required on Class II, IIIa, IIIb and IV laser systems. The beam attenuator
is a mechanical or electrical device such as a shutter or attenuator that blocks emission. The
beam attenuates blocks bodily access to laser radiation above Class I limits without the need to
turn off the laser. The beam attenuator must be available for use at all times during operation.
REMINDER
Power switches and key controls do not satisfy the attenuator requirement.
The beam shutter should be installed between the laser head and the scan head. The following
figure shows the recommended location of the shutter.
We strongly recommend that you specify a laser with a vendor-supplied
shutter mechanism. If this is not possible, consult the laser vendor to design a
proper safety shutter.
NOTE
Laser Scanner
Hazard Zones
of a XLR8 Scan
Head
91-0021 Rev. D
Copyright © 2010 Nutfield Technology
XLR8
SCAN HEAD
The figure shows
the laser's internal
and external optical
path towards the
target plane,
specifically where
the hazard zones are
located as the
optical beam passes
through an XLR8
Scan Head.
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