1.71 Blue Cut Spin Photochromic Gray HMC Optical lenses

Short Description:

The quality of substrate determines the durability of the lens and the reliability of the coating. Good substrate clear and bright, long use time and not easy to yellow; And some lenses do not use for a long time on the yellow, or even coating off. Good lens without any scratches, scratches, hairy surface, pitting, lens oblique to meet the light observation, the finish is very high. There is no spot, stone, stripe, bubble, crack inside the lens, and the light is bright.

The higher the refractive index, the thinner the lens, and the higher the price.

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Product Detail

Product Tags

Production Details

Place of Origin:	Jiangsu	Brand Name:	BORIS
Model Number:	Photochromic Lens	Lenses Material:	SR-55
Vision Effect:	Single Vision	Coating Film:	HC/HMC/SHMC
Lenses Color:	White(indoor)	Coating Color:	Green/Blue
Index:	1.71	Specific Gravity:	1.38
Certification:	CE/ISO9001	Abbe Value:	37
Diameter:	75/70/65mm	Design:	Asperical

Resin sheet can do hard (scratch), anti-reflection, anti-static, dustproof, waterproof and so on up to ten layers of coating treatment, different coating treatment has different effects, if reduce the coating treatment process, the quality of the lens will be greatly discounted.

Color changing speed is an important reference factor when choosing color changing lenses. The faster the lens changes color, the better, for example, from a dark room to a bright light outside, the faster the color changes, in order to prevent the damage of strong light/ultraviolet rays to the eyes in time.

Generally speaking, film discoloration is faster than substrate discoloration. For example, the new film layer color change technology, photochromic factors using spiropyran compounds, which has better light responsiveness, using the molecular structure itself to reverse the opening and closing to achieve the effect of passing or blocking light, so the speed of color change is faster.

Production Introduction

Resin is just a general term, just like clothes are made of cloth. If the resin is subdivided, there are cotton cloth, linen and so on. If the resin is finely divided, there are CR39, MR-8 and so on. Different resin materials have different properties and prices, so the price of lenses is different.

Spherical, aspheric, single-optical, double-optical, progressive, cyclic foci, etc. These are called lens designs. Different designs produce different functions. The same function may also have advantages and disadvantages due to different designs, and the price will be different.