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3.5.2. Treatment Head Attachments
Beam divergence and the Nominal Ocular Hazard Distance (NOHD) for each of the treatment heads
are listed in the below
table. NOHD is defined in ANSI Z136.3 as “
the distance along the axis of the
unobstructed beam from the laser to the human eye beyond which the irradiance or radiant exposure
during normal operation is not expected to exceed the appropriate Maximum Permissible Exposure
(MPE).
” At distances greater than the NOHD, the beam intensity becomes lower than the MPE.
Nominal Ocular Hazard Distance (NOHD) Table
Name
Image
Divergence
(radians)
NOHD (meters)
OFF
-CONT
AC
T
Flat Window
0.815
0.6
Small Cone
0.815
0.4
Large Cone
0.815
0.4
ON
-CONT
AC
T
Small Massage Ball
0.226
1.1
Large Massage
Ball
0.057
4.9
3.6. Fiber Management
The side of the FXi console has an easy-to-use Fiber Manager Spool and Hand Piece Clip
that allows the user to store the beam delivery assembly while not in use. When therapy is
discontinued or between treatment cycles, the user may rest the hand piece in the Hand
Piece Clip. For long term storage and during transport, the user may also wrap the fiber
around the Fiber Manager Spool to avoid damage to the fiber.
