AdValue Photonics AP-ML1 Посібник користувача - Сторінка 5
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a. If ophthalmic examinations are undertaken, they should be carried out by a
qualified specialist and should be confined to workers using Class 4 lasers;
b. A medical examination by a qualified specialist should be carried out immediately
after an apparent or suspected injurious ocular exposure. Such an examination
should be supplemented with a full biophysical investigation of the circumstances
under which the accident occurred;
Material Processing:
Specifications for laser products used to process materials may vary according to their
intended use. If the users wish to process materials other than those recommended by the
manufacturers, they should make themselves aware of the different degrees of risk and
hazards associated with the processing of such materials, and take appropriate
precautions to prevent, for example, the emission of toxic fume, fire, explosion or
reflection of laser radiation from the work piece.
Laboratory and workshop installation of Class 4 Laser Products:
Class 4 laser products can cause injury from either the direct beam or its specular
reflections and from diffuse reflections. They also present a potential fire hazard. The
following controls should be employed to minimize these risks.
a. Beam paths should be enclosed whenever practicable. Access to the laser
environment during laser operation should be limited to persons wearing proper
laser protective eyewear and protective clothing.
Beam paths should avoid work area, where possible and long sections of tubes
should be mounted so that thermal expansion, vibration, and other sources of
movements in them do not significantly affect the alignment of beam forming
components.
b. Class 4 lasers should be operated by remote control whenever practicable, thus
eliminating the need for personnel to be physically present in the laser
environment.
c. Good room illumination is important in areas where laser eye protection is worn.
Light colored diffuse wall surfaces help to achieve this condition.
d. Fire, thermally induced aberrations in optical components, and the melting or
vaporization of solid targets designed to contain the laser beam, are all potential
hazards induced by the radiation from Class 4 lasers. A suitable beam stop should
be provided, preferably in the form of an adequately cooled metal or graphite
target. Very high power densities can be handled by absorbing the radiation over
several reflections, each reflecting surface being inclined at such an angle to the
incident radiation as to spread the laser power over a wide area.
e. Special precautions may be required to prevent unwanted reflections in the
invisible spectrum from far infra-red laser radiation, and the beam and target area
should be surrounded by a material opaque at the laser wavelength. (Even dull
metal surfaces may be highly specular at the CO2 wavelength of 10,6 μm.)Local
screening should be used wherever practicable to reduce the extent of reflected
radiation.
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