1.56 Semi Finished Blue cut photo grey Optical Lenses

Short Description:

Color-changing lenses darken when the sun shines. When the lighting fades, it becomes bright again. This is possible because the silver halide crystals are at work.

Under normal conditions, it keeps lenses perfectly transparent. When exposed to sunlight, the silver in the crystal is separated, and the free silver forms small aggregates inside the lens. These small silver aggregates are irregular, interlocking clumps that cannot transmit light but absorb it, darkening the lens as a result. When the light is low, the crystal reforms and the lens returns to its bright state.

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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:	1.56	Specific Gravity:	1.28
Certification:	CE/ISO9001	Abbe Value:	35
Diameter:	70/75mm	Design:	Asperical

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

Generally, the service life of the color changing lens is about 1-2 years, but many enterprises are trying to extend the service life of the color changing lens.

The film change lens will also be enhanced coating treatment after the rotation coating of the color change layer, and the color change substance used - spiropyran compounds themselves also have good photostability, color change function of longer time, basically can reach more than two years.