When mention to the tempered glass screen protector，many people are familiar with it. The tempered glass screen protector mainly refers to a thin glass cover with strong wear resistance, which can help us better protect the mobile phone screen. Tempered glass screen has the benefit of scratch resistance and high light transmission. Even broken, it will hurt people.
After years of development there are more and more screen protector types in the market. The anti blue ray is one of new screen protectors. So what is the difference between anti blue ray screen protector and ordinary screen protector, Is anti blue ray screen protector really work? How to identify a good anti blue ray screen protector? We will talk about this.
The wavelength of visible light in nature is from 400 nanometers to 700 nanometers, and from 400 nanometers to 500 nanometers, the color that our human eyes perceive is blue, so we call this blue ray. The blue light that we are most exposed to in our daily life comes from LCD screens, mobile phones, tablets and computers.
The short wave and high energy characteristics of blue light determine its strong penetration. The blue light can easily pass through the lens and reach the retina. Long-term exposure of the eyes will cause atrophy of retinal pigment epithelial cells and death of photosensitive cells.
Being exposed to blue light for a long time，for example，when you are playing on mobile phone/computer，will cause great damage to the eyes. Therefore, reducing the amount of blue light that reaches the retina is critical to protecting the eyes for heavy electronics users.
The anti blue ray screen protector can effectively block the high-energy short-wave blue light which is harmful to eyes (400nm~470nm). The principle of technology is based on
a unique anti blue light nano layer. when the blue light emits from the screen it will be greatly blocked by the nano layer, the amount reaching retina decreased, so that is can avoid the stimulation of the radiation on the eyes. Good anti blue light tempered glass screen protectors are developed with imported ultra-thin nano glass and top optical grade materials, Have the characteristic of good scratch resistance, anti-drop, anti-fingerprint, waterproof, Anti-radiation, anti-oil. No only protect the safety of the mobile phone screen, but also your eye.
When selecting anti blue ray screen protector. It is necessary to check whether it has been proved by Third-party testing agency. By now，the anti blue ray screen protector on the market has low anti blue ray，about 20-30%.
1. 90° field of view, looking directly at the screen of the mobile phone, the anti-blue ray tempered glass screen protector shows a light blue and slightly purple light.
2. 30° view to the left and look directly at the phone screen. The anti-blue ray tempered glass screen protector will appear colorless and transparent.
3. 30° view to the right and look directly at the phone screen. The anti blue ray tempered glass screen protector will still appear colorless and transparent.
In fact, the simplest understanding of Blu-ray is that it will imply that we should not sleep now. The main sources of our exposure to blue light are mobile phones and computers.
Therefore, many mobile phone manufacturers have launched anti-blue ray screen protectors. Although it can effectively reduce the damage of blue light to the eyes, It is recommend that you should reduce use of cellphone, and after long time use，your should take a rest and relax your eyes，