|Place of Origin:||China|
|Brand Name:||Aogang Optics|
|Model Number:||Polycarbonate Lens Blanks|
|Minimum Order Quantity:||500 pairs|
|Packaging Details:||1) Standard white envelope 2) Color envelop with customer design|
|Delivery Time:||10~30 days, depend on the order quantity|
|Payment Terms:||L/C, D/A, D/P, T/T, Western Union, MoneyGram, Paypal|
|Supply Ability:||40,000 pieces per day|
|Monomer:||Polycarbonate||Round Top Segment:||28|
|Abbe Value:||32||Specific Gravity:||1.20|
|Transmission:||>97.5%||Power Range:||BASE: 400, ADD: +75~+3.50|
1.59 Semi-finish Round Top Anti-reflection Coated Polycarbonate Lens Blanks
I. Technical Data:
|SEMI-FINISHED PC ROUND TOP BIFOCALS|
|Sage @50mm||Sage @40mm||Center Thickness (mm)||Edge Thickness (mm)||True Curve @1.530||Back Curve||Dseignand SuggestedRX Range|
|Round Top Segment||Abbe Value||Specific Gravity|
|>97.5%||BASE: 400||ADD: +75~+3.50|
1. PC Polycarbonate Lens
Polycarbonate lenses. In the early 1970s, Gentex Corporation introduced the first polycarbonate lenses for safety glasses. Later that decade and in the 1980s, polycarbonate lenses became increasing popular and remain so today.
Originally developed for helmet visors for the Air Force, for "bulletproof glass" for banks and other safety applications, polycarbonate is lighter and significantly more impact-resistant than CR-39 plastic, making it a preferred material for children's eyewear, safety glasses and sports eyewear. Best of all, polycarbonate lenses are virtually unbreakable, making them a great choice for children and active adults.
2. Round Top Bifocal Lens
|Bifocal means two focuses literally. Multifocals are eyeglass lenses that enable you to see clearly at two different distinct distances while only using one lens. Benjamin Franklin has been credited with inventing the first bifocal lens by cutting two lenses in half from two different lens prescriptions and gluing them together. The top half was used to see greater distances while the lower half assisted greatly with viewing objects and text within arm's reach.
Bifocal glasses are used for many reasons, but the most common reason is Presbyopia. Presbyopia is a vision condition in which the crystalline lens within the eye looses its flexibility thus hampering the ability to focus. One may need a multifocal lens simply due to age.
IV. Coating Choice
Hard Coated(HC): To enhance the hardness of the lens to prevent the substrate scratch
Hard Multi Coated(HMC/ AR): To protect the lens effectively from reflection, enhancing functional and charity of your vision
Super Hydrophobic Coated(SHMC): To make the lens waterproof, antistatic, anti slip and oil
V. Packing & Shipping
|Envelope||Carton||Lenses Pair||Size||Weight||Lead Time|
|Choice 1||White Envelope||Stand Export Carton||Finished optical lens: 1 pcs/envelope, 500 pairs/carton||38*48*35 cm||21 KG||Depend on the order quantity|
|Choice 2||Your design with your logo||Semi-finished optical lens: 1 pcs/envelope, 100 pairs/carton||15 KG|
|Carrier||We can choose for you or you offer us your cooperative company|
|All the numbers provided above are estimated number, the actual number need to be measured according to the order you make.|
|Payment Term||30% T/T in advance, the balance before shipment|
VI. Why Choose Us
1. We are a manufacturer with many years exporting experience. All lenses are exported to European countries, Japan, Korea, North and South America, Middle East, Southeast Asia and Africa market. We guarantee the quality to all buyers all over the world, and got a high reputation about quality from buyers in the past 8 years exporting time.
2. We will begin to track the product processing every day until you receive the goods and verify the product quality when you finish the payment. You could contact us via Internet chat tools anytime, for example Skype, Whatsapp.
3. Our producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process to contral lens quality.
4. We accept OEM &ODM orders. Actually most of our products are customized. We will try our best to fulfill your requirements about the material, the size and the printing.
Peggy Lu: +8615052975513 (WhatsApp)