black coated optical window

The application purpose of black coating

1. Reduce stray light coefficient: The main purpose of applying black ink is to absorb the light from the edges of optical components, thereby reducing the stray light coefficient of the optical system. The presence of stray light can interfere with the imaging quality
By applying black, the influence of stray light on the image can be effectively reduced, and the contrast and clarity of the image can be improved.
2. Absorption of reflected light: The black coating can also absorb the reflected light from the tube and the diaphragm. Reflected light can also cause noise and affect the imaging quality. By applying black ink, these reflected lights can be effectively reduced, further enhancing the performance of the optical system.
3. Aesthetics and harmony: The black coating not only has functionality but also makes the appearance of the lens more harmonious and beautiful. In the manufacturing process of optical components, applying ink can cover up some unattractive edge parts and enhance the overall visual effect of the product.