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Safety Class

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  If the products are unsealed by a private handling & rebuilding, you may injure your eyes
  - Use extreme caution at all times when laser is in use.
- Do not point laser at the eye.
- You should wear proper laser safety goggles at all time when the laser is operating
- The infrared laser light may be invisible to the human eye. Therefore, when the power
switch is ON, do not watch the laser beam aperture
- Do not place any flammable objects directly in front of the free, non-extended beam.
Especially with higher power beams
1. Safety Classification and Measurement methods
As the laser properties, it can concentrate on the unit area. If your eyes are exposed by this high
energy, because you may injure your eyes and skin, you have to prevent an accident from taking place
by a mark & a label on the product.
We define the energy of maximum permissible exposure about eye and skin as MPE, Safety class of Laser Products are classified according to the output power and wavelength of laser beam and measurement distance.
We must follow with applicable safety regulations.
2. Classification
Lanics classify in accordance with the terms of IEC 60825-1(International Electrotechnical commission).
Safety class is classified in 1, 1M, 2, 2M, 3R, 3B, 4 classes. Class 1 is lowest class and higher classes are dangerous
3. Measurement method
After calculating AEL value of class 1 by wavelength, optical power, exposure time of laser system or module, you can compare AEL of class 1 with measured optical power.
If the measured optical power is less than AEL of class 1, this laser product is class 1. But if this power is more than AEL of class 1, after calculating again AEL value of class 2, you have to compare
with those data.
Like this, Safety classes can be classified.

Optical power of laser system is measured by below method. Namely, at the measurement distance
100mm, you measure maximum power of aperture 7mm (pupil size)

You must refer the IEC 60825-1 for the exposure time and calculating AEL of each safety class.
4. Diagram of laser induced damage in biological systems.
1. Laser energy is absorbed by the system.
2. The absorbed energy produces heat which is conducted to surrounding tissues
3. In long-pulse or CW lasers the persistence of thermal front gives rise to a progressively
enlarging lesion.
4. In short pulse lasers the high power density gives rise to explosive rupture of cells and damage by physical displacement.
5. Safety regulations of each classes

Class 1: Considered eye-safe, including while using optical instruments for intrabeam viewing.
Normal exposure to this type of beam will not cause permanent damage to the retina (MPE(eye)
Class 1M : Considered eye-safe, Normal exposure to this type of beam will not cause permanent damage to the retina (MPE(eye)). The laser beam should never be intentionally aimed at people.
Class 2 : Considered eye-safe about exposure in blinking reflex time(0.25s), including while using optical instruments for intrabeam viewing. The laser beam should never be intentionally aimed at people.
Class 2M : Considered eye-safe about exposure in blinking reflex time(0.25s), The laser beam should never be intentionally aimed at people.
Class 3R : MPE(eye) can be increased to 5 times, including while using optical instruments for intrabeam viewing. Therefore, naturally, the laser beam should never be intentionally aimed at people. And trained person should comply with all of the applicable requirements and precautions.
Class 3B : MPE(eye) can be increased to 5 times, including while using optical instruments for intrabeam viewing.
But MPE(skin) can’t be increased to 5 times. And trained person should comply with all of the applicable requirements and precautions.
Class 4 : MPE(eye) and MPE(skin) can be exceeded, including while using optical instruments for intrabeam viewing.
And specular reflection is dangerous too. In addition precautions of class 3B, you should have protective eyewear and clothing. You must remove all obstacles of inattentive specular reflection beam.