Product Knowledge
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How to check whether the blue light blocking lens is really blue light blocking?
The editor replied: Could it be the problem of the test pen? There are three ways to identify whether a blue light blocking lens has the function of blue light blocking: (1) Test method of spectrophotometer. This is a laboratory method, the equipment is expensive, heavy,...Read more -
Lenses also have an expiration date, your lenses should be replaced
Same as tires, toothbrushes and batteries, lenses also have an expiration date. So, how long can the lenses last? Actually, lenses can be reasonably used for 12 months to 18 months. 1. Lens freshness During the use of optical lens, the surface will be worn to a certain extent. The resin lens can...Read more -
Better lenses – PC space lenses, do you know?
1. What is a PC lens? PC is a good performance of thermoplastic engineering plastics, it is five engineering plastics inside the good transparency of the product, but also in recent years the rapid growth of general engineering plastics. At present, it is widely used in ...Read more -
PC diaphragm used as lens to become mainstream? What are the benefits of PC lenses?
Polycarbonate (PC), also known as PC plastic; It is a polymer containing carbonate group in the molecular chain. According to the structure of ester group, it can be divided into aliphatic group, aromatic group, aliphatic group - aromatic group and other types. PC lens m...Read more -
How do 3D glasses for 3D movies work? What are the classifications of 3D glasses?
Why do you wear 3D glasses to watch 3D movies? When shooting the film need to wear 3 d glasses is in some ways, people see objects of the stereo effect, because the 3 d film with two cameras, and simulate human two eyes, let the eye is a camera picture, in the right eye ...Read more -
Anti-blue light and anti-blue light lens
We refer to the light that the human eye can see as visible light, that is, "red orange yellow green blue blue purple". According to most national standards, visible light in the wavelength range of 400-500 nm is called blue light, which is the shortest wavelength and th...Read more -
How do 3D glasses create a three-dimensional effect?
How do 3D glasses create a three-dimensional effect? There are actually many types of 3D glasses, but the principle of creating a three-dimensional effect is the same. The reason why the human eye can feel the three-dimensional sense is because the left and right eyes o...Read more -
Progressive lenses for vision over 40
Progressive lenses for vision over 40 After age 40, no one likes to advertise their age — especially when you start having trouble reading fine print. Thankfully, today’s progressive eyeglass lenses make it impossible for others to tell you’ve reached “bifocal age.” Progr...Read more -
Prevent blue light glasses can protect an eye, still can prevent myopic? Attention! It’s not for everyone…
I'm sure you've heard of blue-blocking glasses, right? Many people need to work with mobile phones and computers for a long time, specially equipped with anti-blue light glasses; Many parents heard that this kind of glasses can prevent myopia, have prepared a pair for th...Read more -
4 Common Lens Coatings for Glasses
Lens coatings are applied to eyeglass lenses to enhance the durability, performance and appearance of your glasses. This is true whether you wear single vision, bifocal or progressive lenses. Anti-Scratch Coating No eyeglass lenses — not even glass lenses — are 100% scratch-proof. However, lenses...Read more -
The physics of 3D glasses
3D glasses, also known as "stereoscopic glasses," are special glasses that can be used to view 3D images or images. Stereoscopic glasses are divided into many color types, more common is red blue and red blue. The idea is to allow both eyes to see only one of two images ...Read more -
How to choose the correct refractive index of lens?
When selecting the lens, there will be 1.56, 1.61, 1.67, 1.74 and other values to choose, this value refers to the refractive index of the lens. The higher the refractive index of the lens, the thinner the lens is and the harder the lens is. Of course, the higher the ref...Read more
