What are the advantages of resin lenses?

What are the advantages of resin lenses?

As a myopic eye group, myopia glasses are indispensable. When wearing glasses, there will be a choice of lenses made of different materials. The following   editor will talk about resin lenses. So what are the advantages of resin lenses?

First of all, the resin lens is an organic material. The interior is a polymer chain structure, which is connected to form a three-dimensional network structure.

The intermolecular structure is relatively loose, and there is a space for relative displacement between the molecular chains. The light transmittance is 84%-90%, good light transmission, and the optical resin lens has strong impact resistance.

Let's talk about the advantages of resin lenses:

One: light. The general resin lens is 0.83-1.5, while the optical glass is 2.27~5.95.

Two: strong impact resistance. The impact resistance of resin lenses is generally 8-10kg/cm2, which is several times that of glass, so it is not easy to break, safe and durable.

Three: good light transmission. In the visible light region, the light transmittance of the resin lens is similar to that of glass; in the infrared light region, it is slightly   higher than that of glass; in the ultraviolet region, the light transmittance decreases with the decrease of the wavelength starting from 0.4um, and almost all the   light with a wavelength less than 0.3um absorb.

Four: low cost. Injection-molded lenses can be mass-produced after making a precise mold, saving processing costs and time.

Five: Can meet special needs. For example, it is not difficult to make aspherical lenses, but it is difficult to make glass lenses.

shortcoming

The disadvantages are: surface wear resistance, chemical resistance is worse than glass, surface is easy to scratch, and water absorption is greater than glass. These   shortcomings can be improved by coating methods.

The fatal disadvantages are high thermal expansion coefficient, poor thermal conductivity, low softening   temperature, and easy deformation to affect optical performance.

Ousen Eyewear is a professional glasses manufacturer. We provide glasses frames with lenses of various materials and functions.

If you have any needs, please contact us!

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