product

1.56 progressive hmc optical lens

Short Description:

Progressive Regular Short Corridor(1.56)

-ADD Power: -8.00 to +3.00 in 0.25D steps.

1.56 S/F PROGRESSIVE
DIA(mm) NOMINAL CURVE TRUE CURVE BACK CURVE CT(mm) ET(mm) SAG(40mm) ADD POWER RX RANGE
70-14/12mm 1.00 1.80 6.20 10 6 0.64 1.00~3.00 -8.00~-4.25
3.00 3.30 4.00 6 6 1.20 1.00~3.00 -4.00~-0.75
5.00 5.50 4.00 6 8 2.02 1.00~3.00 -0.50~+2.50

 

 


Product Detail

Product Tags

Quick Details

Place of Origin: Jiangsu, China Brand Name:Hongchen
Model Number: 1.56 Lenses Material:Resin
Vision Effect: Progressive Coating:HMC, HMC EMI
Lenses Color: Clear Refractive Index:1.56
Diameter: 70/12mm,70/14mm,70/17mm Monomer:NK55 (Imported From Japan)
Abbe Value:38 Specific Gravity:1.28
Transmission:98-99% Coating Choice:HC/HMC/SHMC
Photochromic:NO Guarantee::5 Years
Corridor Length::12mm&14mm&17mm
 Power Range:
SPH:-3.00~+3.00,ADD: +1.00~ +3.00

What is Lens Index?

The lens index refers to the index of refraction (otherwise known as refractive index) of lens material for eyewear. It is a relative measurement number that describes how efficiently the material bends light. Light refraction will depend on how quick light itself passes through the lens. 

index

1.56 Mid-Index

The difference between 1.56 mid-index and 1.50 standard lenses is thinness. Lenses with this index reduce lens thickness by 15 percent. Full-rim eyewear frames and glasses worn during sports activities are most suitable for this lens index. 

The most common materials available for use in lenses used to be glass and a hard resin called CR-39. With the continuous improvement of technology, there are more requirements of CR39(optical/plastic) lenses than glass lenses. We are a manufacturer of optical lens, and in these lenses, 1.56 index lenses are one of the most popular lenses all over the world. Furthermore, lenses with 1.56 index are considered the most cost effective lens on the world market. 

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Refractive Index

Lens materials are classified on their refractive index. This refractive index is the ratio of the speed of light when it travels through air to the speed of light when it passes through the lens material. It is an indication of how much light is bent as it travels through the lens. Light is refracted, or bent, at the front surface of the lens, then again as it exits the lens.A denser material bends light more, so not as much material is needed to achieve the same refractive effect as a less dense material. Hence the lens can be made thinner, and also lighter.

Packaging & Delivery

Delivery & Packing

Envelops(For choice):

1) standard white envelops

2) Our brand "Hongchen" envelops

3) OEM envelops with customer's Logo

Cartons: standard cartons:50CM*45CM*33CM(Every carton can include aroud 500 pairs ~600 pairs finished lens, 220pairs semi-finished lens.  22KG/CARTON,0.074CBM)

Nearest shipping Port  : Shanghai port

Delivery Time :

Quantity(Pairs)

1 - 1000

>5000

>20000

Est. Time(days)

1~7 days

10~20days

20~40 days

If you have any special requirements, can contact with our sales people, we can do all series service similar as our Domestic brand.

 

Shipping&Package

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Video Description

Product Details

1.56 Progressive HMC Optical Lens
Refractive Index 1.56
Monomer NK55 Imported from Japan
Abbe Value   38
Specific Gravity  1.28 
 Transmission 98-99% 
Coating  Hard and AR coating for both lens surface ,high anti-scratch
 Coating colour choice Green/Blue
 Guarantee  5-Year
 Corridor Lenght 12mm&14mm&17mm
  Power range:SPH:-3.00~+3.00  ADD:+1.00~+3.00

Technical Date

Progressive Lens Technical Data Sheet
SPH ADD Φ72mm SPH ADD Φ72mm
(+) (+) F.C. B.C. E.T. (-) (+) F.C. B.C. C.T.
0.00 1.00-3.00 3.00 3.00 2.2 0.25 1.00-3.00 3.00 3.25 2.2
0.25 1.00-3.00 3.00 2.75 2.2 0.50 1.00-3.00 3.00 3.50 2.0
0.50 1.00-3.00 3.00 2.50 2.2 0.75 1.00-3.00 3.00 3.75 2.0
0.75 1.00-3.00 3.00 2.25 1.8 1.00 1.00-3.00 3.00 4.00 2.0
1.00 1.00-3.00 3.00 2.00 1.8 1.25 1.00-3.00 3.00 4.25 1.7
1.25 1.00-3.00 3.00 1.75 1.6 1.50 1.00-3.00 3.00 4.50 1.7
1.50 1.00-3.00 3.00 1.50 1.6 1.75 1.00-3.00 3.00 4.75 1.7
1.75 1.00-3.00 3.00 1.25 1.6 2.00 1.00-3.00 3.00 5.00 1.7
2.00 1.00-3.00 3.00 1.00 1.6 2.25 1.00-3.00 3.00 5.25 1.5
2.25 1.00-3.00 3.00 0.75 1.6 2.50 1.00-3.00 3.00 5.50 1.5
2.50 1.00-3.00 3.00 0.50 1.6 2.75 1.00-3.00 3.00 5.75 1.5
2.75 1.00-3.00 3.00 0.25 1.6 3.00 1.00-3.00 3.00 6.00 1.5
3.00 1.00-3.00 3.00 0.00 1.6          
 TOLERANCE OF FRONT/BACK CURVE: ±0.25
 E.T.TOLERANCE:  ±0.3
 POWER TOLERANCE: S 0.00/ ADD+1.00~ +3.00  ±0.08D
S -0.25~ -3.00/ ADD+1.00~ +3.00  ±0.09D
S +0.25~ +3.00/ ADD+1.00~ +3.00  ±0.09D

 

Product Feature

What are progressive lenses?

Progressive lenses are no-line multifocal eyeglass lenses that look exactly the same as single vision lenses. In other words, progressive lenses will help you see clearly at all distances without those annoying (and age-defining) "bifocal lines" that are visible in regular bifocals and trifocals.

 

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The power of progressive lenses changes gradually from point to point on the lens surface, providing the correct lens power for seeing objects clearly at virtually any distance.

Bifocals, on the other hand, have only two lens powers — one for seeing distant objects clearly and a second power in the lower half of the lens for seeing clearly at a specified reading distance. The junction between these distinctly different power zones is defined by a visible "bifocal line" that cuts across the center of the lens.

Progressive lenses are line-free multifocals that have a seamless progression of added magnifying power for intermediate and near vision.

Progressive lenses sometimes are called "no-line bifocals" because they don't have this visible bifocal line. But progressive lenses have a significantly more advanced multifocal design than bifocals or trifocals.

Premium progressive lenses (such as Varilux lenses) usually provide the best comfort and performance, but there are many other brands as well. Your eye care professional can discuss with you the features and benefits of the latest progressive lenses and help you find the best lenses for your specific needs.

Progressive Lens Benefits

Progressive lenses, on the other hand, have many more lens powers than bifocals or trifocals, and there's a gradual change in power from point to point across the surface of the lens.

The multifocal design of progressive lenses offers these important benefits:

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  • It provides clear vision at all distances (rather than at just two or three distinct viewing distances).
  • It eliminates bothersome "image jump" caused by bifocals and trifocals. This is where objects abruptly change in clarity and apparent position when your eyes move across the visible lines in these lenses.
  • Because there are no visible "bifocal lines" in progressive lenses, they give you a more youthful appearance than bifocals or trifocals. (This reason alone may be why more people today wear progressive lenses than the number who wear bifocal and trifocals combined.)

Coating Choice

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Hard Coating/

Anti-scratch Coating

Anti-reflective Coating/

Hard Multi Coated

Crazil Coating/

Super Hydrophobic Coating

 Avoid ruining your lenses quickly protect them from getting scratched easily Reduce glare by eliminating the reflection from the surface of the lens not to be confused with palarized Make the surface of the lenses super   hydrophobic, smudge resistance,  anti static, anti scratch, reflection and   oil
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Productive Process

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Production Flow Chart

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Company Profile

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Company Exhibition

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Certification

Packing&Shipping

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