seconds. The transition from stand-by to ready is possible while the laser emission control button is pressed (i.e placed onto skin);
however, no emission of laser radiation will occur.
Laser emission is started by the laser emission start/stop control button (i.e. placed in contact with the skin). When the emission of
laser radiation starts, the operator is informed by a clear audible signal and the lighting of the blue LEDs. The audible indicator
indicates continuous emission by repeatable signals.
8.2 General risks with Class 1 Lasers (see Chapter 2.2) IEC 60825-1
8.3 Maintenance and control of emitted output power
Operating this device with an output power that is much lower than intended or what has been specified may result in poor or
ineffective treatments. If the output power is much higher (+50 %) the NOHD is increased. If the operator wants to check the output
power, the operator should send the device to the supplier of the device or some other source in order to make certain that the device
operates within specifications. If the output power deviates by more than ± 20 %, contact the supplier or the manufacturer for technical
service and calibration of the device. The laser should be measured in those cases where a patient experiences discomfort under
recommended use conditions. For further questions, considerations or need of technical service, please contact the supplier or the
manufacturer.
Important notes regarding periodic measurements of the output power:
The power meter must be able to:
- Measure the wavelengths that the laser emits; and
- Measure output powers of at least 1000 mW (or 1 W).
In addition, the following routines should be adhered to:
- Ensuring that the aperture lenses are clean before measuring the output power (dirty lenses may reduce the output power
by absorption and cause discomfort due to the heat generated);
- The power meter should be placed very close to the laser aperture to ensure that the whole beam is fitted onto the part
measuring the output power; and
- Measurements should be performed on all apertures.
How to check if the device emits laser radiation
- The 904 nm laser radiation is almost invisible to the eye but can be seen if photographed with some cell phone cameras
when the aperture is placed close to a non-reflective material, for example, the palm of the hand. This method can be used
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