Basic Info.
Model NO.
simi-finished 1.56 UV420 blue cut HMC
Diameter
70/75mm
Guarantee
3~5 Years
Keywords
Sf 1.56 Blue Light Blocking Lens
Brand
Seesen
Product Description
What Is Blue Light?
Blue light is naturally produced by the sun but also by computer monitors, smartphone screens and other digital devices.
| MATERIAL REFRACTIVE INDEX = 1.56 TOOLING INDEX = 1.530 | ||||||||
| Nominal curve | T.C | Sag | Rad | Back Curve | Diameter | C.T | E/T | RX Range Recommended |
| 0.5 | 0.56 | 0.202 | 990.2 | 5.25 | 75 | 8 | 13.5 | (-400~-2000)/-600 |
| 2 | 2.12 | 0.76 | 263.567 | 5.25 | 75 | 7.5 | 11.5 | (-200~-325)/-600 |
| 3 | 3.21 | 1.15 | 174.488 | 5.25 | 75 | 7 | 9.5 | (-000~-200)/-600 |
| 4 | 4.26 | 1.53 | 131.483 | 5.25 | 75 | 8 | 9.4 | (+000~+300)/-600 |
| 5 | 5.27 | 1.9 | 106.213 | 5.25 | 75 | 8.5 | 8.5 | (+300~+400)/-600 |
| 6 | 6.38 | 2.31 | 87.135 | 3.5 | 75 | 10.25 | 6.5 | (+400~+500)/-600 |
| 8 | 8.76 | 3.21 | 63.91 | 3.5 | 75 | 13.5 | 7.5 | (+500~+800)/-600 |
| 10 | 11.5 | 4.35 | 48.152 | 3.25 | 75 | 20 | 9 | (+900~+1150)/-600 |
Details:
Why we need the blue cut lens?
The most common effects of too much blue light exposure are eye strain, blurred vision, and headaches. However, recent studies have focused on blue light's negative impact on the circadian rhythm and found that watching TV or using a tablet before bedtime, for example, can result in restlessness and disrupted sleep cycles.
Advantages:
About the Coating:
Custom Service:
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.
