China 1.61 Photo Gray HMC optical lens Manufacture and Factory

1.61 Photo Gray HMC optical lens

Short Description:

Hi-index, Thinner and better vision for eyes.

100% blockage of harmful UV rays.

Optical devices that has the property to darken itself in the presence of ultraviolet rays.

It provides solar protection in exteriors, returning to have a lower level of absorption in interiors.

Can be used equally well throughout the year, in all climates and for many different activities.

Hi-index, Thinner and better vision for eyes.

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Product Detail

Product Tags

Quick Details

Place of Origin:CN;JIA	Brand Name:Hongchen
Model Number:1.61	Lenses Material:Resin
Vision Effect:Single Vision	Coating:HMC,EMI,UV400,superhydrophobic
Lenses Color:Grey	Dimater:65/70/75mm
Design:Aspherical	Abbe Value:42
Specific Gravity:1.3	Light Transmittance:98-99%
Abrasion Resistance:6-8H	Index:1.61
Material:MR-8	Photochromic:gray
Function:superhydrophobic

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.

What are the Benefits of High Index Lenses?

With regular eyeglasses lenses, the center of the glasses is thinner and the outer edges are thicker to facilitate refraction which is what makes prescription glasses work! High index lenses have a higher index of refraction than regular lenses, which means they don’t need to be as thick around the edges to be effective.

High-index lenses mean that the lens itself can be both thinner and lighter. This allows your glasses to be as fashionable and comfortable as possible. High-index lenses are particularly beneficial if you have a strong eyeglass prescription for nearsightedness, farsightedness, or astigmatism. However, even those with a low eyeglass prescription can benefit from high index lenses.

Here are the advantages of photochromic lenses:

Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight.

The molecules responsible for causing photochromic lenses to darken are activated by the sun's ultraviolet radiation. Because UV rays penetrate clouds, photochromic lenses will darken on overcast days as well as sunny days.

Photochromic eyeglass lenses are available in nearly all lens materials and designs, including high-index lenses, bifocals and progressive lenses. An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays.

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

Video Description

PRODUCT SPECIFICATION

Monomer	Import from Korea
Diameter	65/70/75mm
Abbe value	42
Specific Gravity	1.30
Transmission	98-99%
Coting colour choice	Green/Blue
Produce quantity	40,000 pieces per day
Samples	Samples are free charge, and at most 3 pairs. In addition, our customers need to assume the shipping cost
Payment	30% advence by T/T, the balance before shipment

Product Feature

Photochromic lenses are available in nearly all lens materials and designs, including high indexes , bifocal and progressive. An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays.

Because a person's lifetime exposure to sunlight and UV radiation has been associated with cataracts later in life, it's a good idea to consider photochromic lenses for children's eyewear as well as for eyeglasses for adults.

Modern photochromic lenses tend to be plastic and instead of silver chemicals they contain organic (carbon-based) molecules called naphthopyrans that react to light in a slightly different way: they subtly change their molecular structure when ultraviolet light strikes them.