Jiangsu Aogang Optical Glasses Co., Ltd.
Bring the clear world back to you
Add to Cart
SF AR Coating 1.56 Photochromic Round Top HMC Semi Finished Lens Blanks With Bifocal Vision
I. Technical Data:
| 1.56 Semi Finished Photochromic Round Top Lens(Brown/Gray) | ||
| Material: 1.56 Index Resin(Ne=1.56, Abbe=43, Specific Gravity=1.14) Segment Placement=5mm down~5mm in Add Power: +1.00 to +3.50 in 0.25D steps Segment Size=28mm |  | |
| CONVEX SURFACE | CONCAVE SURFACE | |||||||
| Mominal Curve | True Curve | Sag (sagitta: 40mm) | Radius | Radius | CT(mm) | ET(mm) | Dia(mm) | |
| 1.549 | ||||||||
| 2.00 | 70 | |||||||
| 4.00 | 4.17 | 1.50 | 131.74 | 132.50 | 8.0 | 8.0 | ||
| 6.00 | 6.35 | 2.30 | 86.45 | 88.80 | 8.0 | 7.0 | ||
| 8.00 | ||||||||
II. Semi finished:
| Lenses with different dioptric powers can be made from one semi-finished lens. The curvature of the front and back surfaces indicates whether the lens will have a plus or minus power.
Semi-finished lens is the raw blank used to produce the most individualized RX lens according to the patient's prescription. Different prescription powers request for different semi-finished lens types or base curves.
Rather than just the cosmetic quality, semi-finished lenses are more about the inner quality, such as precise and stable parameters, especially for the prevailing freeform lens. | |
III. Features:
1) Photochromic lens:
| The molecules in photochromic technology work by reacting to UV light. However, temperature can have an effect on the reaction time of the molecules. When the lenses become cold the molecules begin to move slowly. This means that it will take somewhat longer for the lenses to adapt from dark to clear. When the lenses become warm the molecules speed up and become more reactive. This means that they will fade back faster. |
2) RT-28 Bifocal lens:
|
The lower half of a bifocal lens contains the near segment for reading and other close-up tasks. The rest of the lens is usually a distance correction, but sometimes has no correction at all in it, if you have good distance vision.
One popular fused bifocal is the round seg bifocal. Round-top bifocals are further described by the width of the near segment, measured in millimeters (mm). The most popular RT bifocal is the RT-28, a round-top bifocal with a near seg that is 28 mm wide.
An advantage of round seg bifocals is that the line separating the distance and near zones of the lens tends to be less noticeable than the upper line of a D-seg bifocal. | |
III. AR coating:
|
|
IV. Packing&Shipping:
| 1. Package (Size: 38*48*35 cm; Weight: 15-21KG): |
| a) Finished optical lens: 1 pcs/envelope, 500 pairs/carton |
| b) Semi-finished optical lens: 1 pcs/envelope, 100 pairs/carton |
| 2. Envelope: |
| a) Standard with envelope |
| b) Color package with your design or logo |
| 3. Delivery Time: |
| a) 3-7 days for samples (UPS, DHL, FEDEX, TNT for samples) |
| b) 5-30 days for batch goods (by air or by sea, depend on order quantity) |
| 4. Carrier: |
| We can choose for you or you offer us your cooperative company |
| 5.Payment terms: |
| 30% T/T in advance, the balance before shippment |
V. Why choose us:
1. About Us:
Jiangsu Aogang Optical Glasses Co.,Ltd is a professional optical lens manufacturer for more than 10 years in China. 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. Our producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process. In Aogang Optical, you can find high quanlity lenses with the most competitive prices.
2. About Samples:
Just send us your requirements, then we will send samples accordingly. We only need 1~2 days to finish the sample production. Samples are free, but according to our company rule, our customers need to assume the shipping cost.