Customization of high-quality sunglass lenses using sapphire crystal glass

People’s aspiration for and pursuit of nice things are one of the motive forces for the progress of the world. This is also true of the search for sunglass lenses using the best glass materials. Authoritative ophthalmologists have announced that the glass with superior optical performance and long-term stability is the best material for ophthalmology. This is a fact that cannot be changed even if the huge ads of resin lenses were put up on all the buildings around the world.

However, the market of glass lenses is still no match for the resin lenses under the mode of large-scale industrialized production and maximized commercial interests. There is no denying that the main excuse for the suppression of traditional ordinary glass lenses is their fragility and excessive weight.

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However, most consumers have no idea that the glass lenses manufactured by Sunphey on the basis of the best materials and the latest physical and chemical hardening technology already have a hardness that is quite high and even 50% thinner than their resin counterparts when applied under some scenarios.

Although we have achieved an excellent performance better than that of resin in the technology of strengthening mineral glass, the strong faith that glass lenses will return to more people drives us to keep developing more powerful products. Thus, we have the sunglass lenses of sapphire crystal glass.

Why are the sunglass lenses of sapphire crystal glass the best lenses for sunglasses?

Sapphire single crystal features the following: a broad transmission wave band, high transmission, high strength, high hardness, high melting point, high heat conductivity, high heat impact quality factor, low scattering, low modulus of elasticity, low heat radiation, resistance against corrosion, high temperature, abrasion, jet fuels, the scouring and erosion by hailstones, rainwater, seawater, salt mist and sands, strong light irradiation. These characteristics enable them to work in adverse environment of high temperature and pressure. Therefore, it plays a role irreplaceable in serving as the optical protection windows of satellites, space technology and submarines. Most of the numerous merits are not found in resin lenses and ordinary glass lenses.

Sapphire has a fairly high hardness, which is second only to that of diamond and 7 times that of steel. This has addressed the weak impact resistance and excessive weight because of which traditional ordinary glass is castigated. Thanks to the high hardness, we can make it into ultra-thin lenses. Sapphire crystal glass has a body dislocation density of ≤2000 and an uncoated light transmittance of 85%. Through the excellent coating process of Sunphey, the one-sided and two-sided coated light transmittance can reach 92% and 98% or higher respectively so that the glass can not only tackle adverse scenarios, but also always maintain a clear field of vision.

The high hardness and strength of the sapphire spectacle lenses of Sunphey can effectively meet the requirements of spectacle lenses for resistance against impact and abrasion. Meanwhile, the refractivity of the sapphire spectacle lenses of Sunphey is higher than that of glass lenses so that their thickness is less under the same optometric readings, thus solving the excessive weight of the spectacles and the discomfort of wearing them. If used on myopic sunglasses of glass, the lenses can meet the requirements of general or highly myopic people for light wearing.

Why cannot sapphire spectacle lenses be popularized and applied?

The products of the traditional processing technology of sapphire lenses have the following drawbacks:Customization of high-quality sunglass lenses using sapphire crystal glass 01

1.Unstable quality and low rate of finished products;

2.Consumption of long time. With a hardness second only to diamond, sapphire materials entail many processes and consumption of a long time.

3.High cost. Although it is not natural sapphire, sapphire crystal glass is a jewelry-level material manually produced to constitute a raw material much precious than ordinary glass. This plus the manpower cost required for processing leads to a high cost.

4.Low light transmittance. Sappire has an uncoated light transmittance of 85% and a one-side coated light transmittance of 92%.

5.Cannot be washed clean;

6. The processing is not environment friendly;

7.Low processing precision and uneven thickness;

8.Low market competitiveness, production capacity and input-output ratio against a high cost.

Why should the sunglass lenses of Sunphey sappire crystal glass be selected?

1.Through optimized processing and manufacturing processes, the sapphire of Sunphey can already be used to produce the lenses of sapphire crystal glass favorable for commercialized operation. Sunphey is currently the first specialized manufacturer of the sunglass lenses of sapphire crystal glass in China.

2.It specializes in and focuses on the production of glass lenses as well as the continuous optimization of the products and relevant processes.

3.Sunphey uses new polished materials in the processing and polishing of sapphire, which can substantially enhance processing precision.

4.The existing excellent glass lens coating technology of Sunphey has been merged there into, thereby further enhancing their optical performance.

5.Production cost has been lowered effectively to ensure the commercial interests of customers.

6.Mass production can proceed in a continuous and stable way.

7.We have launched environment-friendly processes.

We have evolved the production technology of sapphire. However, since the natural property of sapphire is its hardness that is second only to diamond, we inevitably encounter the problems of time consuming process and damage to processing equipment to rule out the possibility of production of an extra-large scale. Besides, sapphire material is precious. All these factors have resulted in the fact that sapphire lenses may be the most expensive sunglass lenses of glass.
Therefore, the lenses of sapphire crystal glass cannot be popularized now and are available to only a minority of people.

Parameters for customizing the sunglass lenses of sapphire crystal glass

Material: Sapphire crystal glass lens eyeglass

Functions: UV380 400, Hydrophobic, Infrared Block, Light Blue Block, Anti Reflection, Scratch Resistant

Lens color: Clear / Grey / Tan / Green / Blue / Brown / Colored Lens

Thickness (mm): 0.7, 0.8, 0.9, 1.0

Lens Size (mm): 48-80

Lens Category: 1,2,3,4

Base Curves: Zero, 200, 400, 600