Protective glasses is a kind of filter that can change the transmitted light intensity and spectrum. The most effective and commonly used method to avoid damage to the eyes caused by radiant light is to wear protective glasses. This kind of glasses can absorb light of certain wavelengths and let other wavelengths of light pass through, so they all present a certain color, and the color presented is the color of the transmitted light. One is the absorption type and the other is the reflection type. The former is most used. Goggles are a kind of glasses that can avoid damage to the eyes caused by radiation by changing the intensity and spectrum of the transmitted light. This kind of glasses is divided into two categories, one is the absorption type, the other is the reflection type, the former is the most used.
This kind of glasses can absorb light of certain wavelengths and let other wavelengths of light pass through, so they all present a certain color, and the color presented is the color of the transmitted light.
Material of goggles
When this kind of lens is manufactured, a part of metal oxides, such as iron, diamond, chromium, strontium, nickel, manganese, and some rare earth metal oxides such as neodymium, are added to the general optical glass formulation. These metal oxides enable the glass to selectively absorb electromagnetic waves in a certain range of light. For example, oxides of cerium and iron can absorb a large amount of ultraviolet rays. The use of this glass lens can reduce the amount of certain wavelengths passing through the lens and reduce or prevent damage to the eyes. Different colors of protective lenses can absorb light of different colors. This kind of glasses is divided into two categories, one is the absorption type, the other is the reflection type, the former is the most used.
Lenses are generally round, and the specifications are expressed by their diameter in mm, including φ48, φ50, φ52, φ56, φ60, φ65, φ70, etc. The most commonly used specifications are φ56, φ60, and φ65. Due to the popularity of large frames, the use of large size lenses such as φ70 has increased.
