Top Lens Material News: Latest Trends & Innovations

2024-06-25
Discover the latest trends and innovations in lens materials. Stay updated with expert insights and market-leading advancements for superior vision solutions.
Toric Sheet  odm sunglasses

 

Glass Lens

The main materials include "Toric Sheet", "Cloche Sheet", "Crocose Sheet", "Super Thin Sheet", "1.60 Glass Lens". These materials have stronger scratch resistance compared to other types of lens materials, but they are relatively heavier. Their refractive index is relatively high: Ordinary lenses are 1.523, super thin lenses are 1.72, and up to 2.0. Their refractive index is higher than that of resin lenses, so they are thinner than resin lenses under the same prescription. Their transparency and mechanical-chemical properties are good, with constant refractive index and stable physical and chemical properties. Non-colored lenses are called optical white (white) or pink lenses, while colored lenses include red lenses. Red lenses can absorb UV light and have a slightly absorbing effect on strong light. However, glass lenses are fragile and have a heavier material composition.
 
Resin sheet
 

Resin sheet

The most representative material is CR-39, which is made of a hard and transparent material with a refractive index of 1.499 and a transmittance of 92%. From its material characteristics, it has good thermal stability, remains unchanged below 150 degrees Celsius, has good water and corrosion resistance (except strong acids), is not soluble in common organic solvents, is lightweight with a density of 1.32, which is half that of glass, has good impact resistance, is not easily broken, has strong safety (in accordance with the FDA standard), is comfortable to wear, and is easy to process. It is widely used (including in semi-frame and no-frame glasses). Its ultraviolet absorption ability is higher than that of glass lenses. However, due to its material limitations, resin lenses also have drawbacks: the surface of the lens is easily wiped and the refractive index of the lens is low, which makes it 1.2-1.3 times thicker than glass lenses.

 

PC(Polycarbonate Lens Sheet)
 

PC (Polycarbonate Lens Sheet):

Ordinary resin lenses are thermosetting materials, which are liquid in raw form and form solid lenses after heating. PC lenses, also known as "space lenses" and "universe lenses", have the chemical name of polycarbonate, which is a thermoplastic material. That is, the raw material is in solid form, shaped into lens by heating, so the finished lens will also be deformed under excessive heat, which is not suitable for high moisture environment. PC lenses have strong toughness, can not shatter (2 cm can be used for bullet-proof glass), and are hence also known as safety lenses. The specific density of PC lenses is only 2 grams per cubic centimeter, which is the lightest material used for lenses. However, processing is more difficult, and the surface of the lens is very easy to scrape, and has poor thermal stability, becoming soft at 100 degrees Celsius.

 
Nylon Lens
 

Nylon Lens

Nylon lenses are primarily made from TROGAMID, a special transparent polyamide (commonly known as memory nylon), which is a micro-sized, ultra-transparent crystal material that is highly resistant to ultraviolet light and has excellent stress-resistant properties and chemical resistance. Its crystal is very small and does not scatter visible light. Its most prominent feature is its excellent resistance to stress cracking and excellent chemical resistance. The processing performance of the lenses is also superior to that of PC lenses. They are the preferred choice for high-end lenses. Despite being surface hardened, their surface scratch resistance is still inferior to CR39 and similar to PC, and their high price, which is several times greater than that of PGCR39, is a major obstacle to widespread use.
 
Polarizing film
 

Polarizing film (Polaroid film)

The function of NDOM is to only accept light from one direction and block light from other directions. It uses the principle of using blinds without watermarks in high-definition to filter out stray light, making our viewing clearer. Polarizing lens principle: In order to filter out the dazzling light from the sun in equal directions on water, land, or snow, a special vertical coating is added to the lens, which is called a polarizing lens. It can eliminate glare and is the preferred choice for drivers. It protects against UV rays and various harmful light in the sun to prevent cataracts, increases contrast color, and provides a clearer and more natural visual experience, giving you a cool feeling. Mirror surface superhard treatment increases the wear resistance and hardness of the polarizer. Polarized sunglasses lenses can absorb 99% of ultraviolet rays and have anti fatigue and anti radiation functions. At the same time, you can also see the hidden graphics in the video, which have good toughness, impact resistance, and can protect the eyes from harm.

 
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wholesale Retro Optical Glasses
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Once we receive your returned eyewear, we will process your return or exchange within 7-10 business days. Refunds will be issued to the original payment method, and exchanges will be shipped promptly.

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We can add logos to all products. For the logo fee, we offer a variety of logos with slightly different prices.

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We want you to be completely satisfied with your custom glasses. If for any reason you're not happy with your purchase, you can return them within 30 days for a full refund or exchange. Please note that certain restrictions may apply, so be sure to review our return policy for details.

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Yes, all of our custom eyewear comes with a limited warranty against manufacturing defects. If you experience any issues with your glasses due to a defect in materials or workmanship, please contact us, and we'll be happy to assist you with a replacement or repair.

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