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China Suppliers Photochromic Lenses Factory - Intelligent Photosensitive Color Change Technology
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 and advantages and disadvantages
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)
How do photochromic lenses work?
Photochromic lenses work on the principle of a reversible chemical reaction. Photosensitive substances (like silver halide) inside the lens react when exposed to ultraviolet (UV) light, causing the lens to darken. When the UV source disappears, the chemical reaction reverses, and the lens returns to its original transparent state.
What materials are used to manufacture photochromic lenses?
Traditional photochromic lenses use inorganic photosensitizers like silver halide, silver barium oxide, copper halide, and chromium halide. Modern lenses increasingly utilize organic photochromic dyes, such as spiropyran compounds, which offer superior photoresponsiveness and faster color transitions.
What are the main performance advantages of these lenses?
These lenses offer rapid discoloration, comprehensive UV protection, anti-reflection, wear resistance, high light transmittance, waterproof features, and anti-fingerprint properties.
Are photochromic lenses suitable for both indoor and outdoor activities?
Yes, they are ideal for both indoor and outdoor use. They automatically adjust transparency to block strong light and harmful UV rays, which helps reduce visual fatigue and protect the eyes.
What is the difference between film layer and substrate color-changing technologies?
The speed and uniformity of color adjustments can vary based on technology. Generally, film layer color-changing technology reacts faster and more uniformly compared to substrate color-changing technology.
How have photochromic lenses evolved over time?
Dating back to the 1940s, photochromic lenses initially utilized glass materials. They have since evolved to use advanced organic photochromic dyes. Modern developments have introduced diverse color choices and integrated features like anti-blue light protection.