There are many types of laser protective glasses. In addition to the differences of materials used, different laser protective glasses have different functions and principles. Therefore, you must understand clearly before purchasing laser protective glasses.
Common laser protective glasses mainly include absorption type, reflection type, compound type, explosive type and so on.
1. Absorption laser protective glasses:
It is to add various absorbents into glass or plastic lenses to absorb the laser so that it cannot pass through.
2. Reflective laser protective glasses:
A group of high refractive index dielectric films are plated on the lens. When the light strikes the dielectric film, all the reflected light phases on the interface are the same, so that the light reflection of this wavelength is strengthened. It can not only reflect the laser to achieve the purpose of protecting glasses, but also have high transmission ability to other visible light.
3. Composite laser protective glasses:
It is composed of two reflective medium films, separated by a layer of glass absorbing color in the middle, so as to suppress the unwanted internal reflection between the two reflective films. This kind of glasses has good laser protection performance and high safety factor. It is suitable for the protection of medium and large power lasers.
4. Explosive laser protective glasses:
Is to paint a layer of explosives on the lens. When the incident laser intensity reaches a certain value, it can be detonated quickly to shield the laser. It is used in military to prevent laser weapons from damaging eyes.
These different types of laser protective glasses have their own characteristics. Usually, a kind of laser protective glasses can only protect one wavelength of laser. You should be optimistic when you buy and use them.