China Photochromic Lens Suppliers - Intelligent Photosensitive Color Changing Glasses Factory
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Specifications & Data
| Product | Photochromic lens | Index | 1.553 / 1.597 / 1.667 |
| Material | Resin / Acrylic / MR-7 / MR-8 | Abbe Value | 34 / 42 / 32-33 |
| Diameter | 65 / 70 / 72 / 75 | Coating | HMC / SHMC / Blue / Green |
Performance Features
Rapid discoloration
UV protection
Anti reflection
Wear resistance
High transmittance
Waterproof
Anti-fingerprint
Working Principle
The color changing effect of photochromic lens is based on the principle of reversible reaction between light and color. When there is no ultraviolet light irradiation, silver halide or other photosensitive substances inside the lens are transparent to visible light; When exposed to ultraviolet light, these substances undergo a chemical reaction, absorbing some visible light and causing the lens to darken. After the light source disappears, these chemical reactions are reversible and the lens will return to its original transparent state.
Manufacturing Materials & Techniques
Photochromic lenses typically use photosensitizers such as silver halide, silver barium oxide, copper halide, and chromium halide. These substances undergo chemical reactions under ultraviolet radiation, causing the lenses to change color. With the development of technology, modern color changing lenses increasingly use organic photochromic dyes, such as spiropyran compounds, which have better photoresponsiveness and can achieve faster color changing speeds.
Application Scenarios, Advantages & Disadvantages
Photochromic lenses are suitable for both indoor and outdoor use, as they can block strong light and ultraviolet rays, reducing damage to the eyes. Its advantages include automatic adjustment of transparency, reduction of visual fatigue, and protection of the eyes. The disadvantage is that the speed and uniformity of color change may vary depending on the technology, and film layer color change technology is usually faster than substrate color change technology.
Historical Background & Development Trends
The history of photochromic lenses can be traced back to the 1940s, with glass lenses being used in the early days and gradually developing to use organic photochromic dyes. With the advancement of technology, modern color changing lenses not only innovate in materials and technology, but also provide more color choices and functions, such as anti blue light, etc.
