Basic Info.
Model NO.
SF 1.499 Progressive UC
Power Range
Sph: 0.00~+3.00 0.00~-2.00 Add: +1.00~+3.00
Transmission
> 97%
Keywords
1.499 Sf Semi-Finished Progressive Lens
Guarantee
3~5 Years
Brand
Seesen
Product Description
SEMI-FINISHED 1.499 PROGRESSIVE UC LENS
| MATERIAL REFRACTIVE INDEX = 1.499 TOOLING INDEX = 1.530 | ||||||||
| Diameter | Nominal Curve | front Radius | T.C | Back Radius | Back T.C | CT/ET | Front Sag Ring 50mm | RX Range Recommened |
| 75 | 200B | 207.67 | 2.55 | 87.43 | 6.06 | 9/7 | 1.51 | -2.25~-6.50 |
| 75 | 400B | 129.37 | 4.1 | 121.39 | 4.37 | 9/9 | 2.44 | +2.00~-2.00 |
| 75 | 600B | 85.5 | 6.2 | 82.44 | 6.43 | 9/11 | 3.74 | +2.25~+4.00 |
What are progressive lens?
Comparison of physical properties of lenses:
| MR-8 | MR-7 | MR-174 | Polycarbonate(PC) | NK-55 | CR39 | |
| Referactive Index | 1.61 | 1.67 | 1.74 | 1.59 | 1.56 | 1.49 |
| Abbe Value | 41 | 32 | 33 | 32 | 37.5 | 58 |
| Specific Gravity | 1.30 | 1.35 | 1.47 | 1.20 | 1.28 | 1.32 |
| Diameter | 65/70/75 | 65/70/75 | 65/70/75 | 65/70/75 | 55/60/65/72 | 55/60/65/70 |
| Impact Resistance | Good | Good | Good | Good | Good | Good |
| Static Load Resistance | Good | Good | Good | Good | Good | Good |
About the Coating Choice:
Hard Coating:
The uncoated lenses are easily subjicted and exposed to scratches, so the hard coating can help the lenses be destoried.
Hard Multi Coating
It also called AR coating, means coat another anti-reflective coating on the hard coating . It can perfectly reduce harmful ray and enhance the vision effect..
Super hydrophobic coating:
Also called crazil coating, can make the lenses waterproof, antistatic, anti slip and oil resistance which can keep half one year ~one year
About our Factory
FAQ:
1. Are your company a manufacturer or a trade company?
We are a manufacturer with many years exporting experience. Our factory is located in Jiangsu province.
2. Can your products be customized?
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, the printing.
3. How can I get sample from you?
Just send us your requirements, then we will send samples accordingly.
4. How many days will samples be finished? How about mass products?
Generally, we need 5-7 days to finish the sample production.As for the mass products, it depends on your order quantity.
5. How do you control lens quality?
Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process.
