Analysis of the Characteristics of Resin Lens Sunglasses

Resin lens sunglasses have the following characteristics:

Lightweight and comfortable: Resin lenses are light in weight, weighing only about half that of ordinary glass lenses. When worn, they exert less pressure on the bridge of the nose and ears, and are less likely to cause fatigue even after long-term use. They are very suitable for daily long-term use.

Strong impact resistance: The impact resistance of resin lenses is generally several times that of glass. They have good flexibility and impact resistance, and are not easy to break. Even if hit, there are few fragments and the broken area is large with blunt edges, which can minimize the damage to the eyes and face to the greatest extent. It is highly safe and especially suitable for sports enthusiasts or children to wear.

Good light transmittance: The light transmittance of resin lenses is relatively high, reaching about 92%, which is more than 2% higher than that of glass lenses. It can provide a clear visual effect and reduce the visual interference caused by light refraction and scattering.

Dyeable and personalized: Resin lenses are easy to dye and can be dyed into different colors according to personal preferences and usage scenarios, making it convenient to match with various clothing and meet personalized needs. Meanwhile, it can also undergo addition processing to obtain functions such as protection against harmful rays and discoloration.

Uv protection: Resin lenses can effectively block ultraviolet rays with wavelengths below 350mm, providing certain protection for the eyes and reducing the risk of eye diseases caused by ultraviolet rays.

Optical performance characteristics: The refractive index of resin lenses is lower than that of ordinary glass lenses, so resin lenses of the same degree are thicker. Its surface reflection is lower than that of ordinary glass lenses and is less dazzling. Resin bifocal lenses are composed of a single piece and are not made by melting like ordinary glass bifocal lenses, so there is no color difference.

Physical properties: Resin lenses have strong impact resistance to high-temperature and small-sized objects. When such objects hit the resin lenses, they will immediately bounce off. However, it has a high coefficient of thermal expansion, poor thermal conductivity, and a low softening temperature. The operating temperature should not exceed 60 degrees; otherwise, the surface anti-reflective film will crack, and even cause the anti-reflective film to fall off. It is also prone to deformation, which will affect the optical performance.

Chemical properties: Resin lenses have an extremely wide range of resistance to chemicals and solvents. With the chemicals and solvents currently used in households, almost none of them will cause damage to resin lenses. However, as an organic compound, it is strictly prohibited to be worn or used in acidic or alkaline environments.

Surface wear resistance: The surface wear resistance of resin lenses is poorer than that of glass. The surface is prone to scratches and has a greater water absorption than glass. These disadvantages can be improved through coating methods.