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China Photochromic Lens - Intelligent Photosensitive Color Change from Leading Suppliers and Factory
Product Video
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
Rapid discoloration
UV protection
Anti reflection
Wear resistance
High transmittance
Waterproof
Anti-fingerprint
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 and 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 & Pros/Cons
Photochromic lens 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 and Development Trend
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.
Frequently Asked Questions (FAQ)
What refractive index options are available for photochromic lenses?
Our photochromic lenses are available in three different refractive indices: 1.553, 1.597, and 1.667, allowing you to choose the thickness and weight that best suits your vision needs.
What materials are used to manufacture these lenses?
These lenses are manufactured using high-quality resin, acrylic, MR-7, and MR-8 materials, combined with advanced photosensitive compounds to ensure optical clarity and durability.
How do photochromic lenses change color?
Photochromic lenses contain photosensitive substances (such as silver halide or organic spiropyran dyes). Under ultraviolet radiation, these substances undergo a reversible chemical reaction that causes the lens to darken. When the UV light source disappears, the reaction reverses, and the lens returns to its original transparent state.
What are the advantages of using photochromic lenses?
The primary advantages include automatic transparency adjustment based on light levels, effective UV protection, reduced visual fatigue, and convenience for both indoor and outdoor activities.
Which coatings are applied to these lenses for enhanced performance?
Our photochromic lenses are treated with premium coatings, including HMC (Hard Multi-Coated), SHMC (Super Hard Multi-Coated), Blue Cut, and Green coatings to provide anti-reflection, wear resistance, waterproof, and anti-fingerprint properties.