Filters are equivalent to a protective layer for lenses. For our bodies, there can be physical and chemical sun protection. For optical lenses, similarly, filters play a protective role.
Characteristics of filters
In the industrial field, protective filters are widely used to protect lenses from dust, damage, moisture or dirt. In addition to the protective function, UV/IR blocking filters also have the function of eliminating some interfering ultraviolet (UV) and infrared (IR) components in the light. Specifically, these filters can block ultraviolet rays with wavelengths below 680 nm and infrared rays above 780 nm, while not affecting color reproduction in the visible light range.
Function of filters
The main function of UV-Cut and IR-Cut filters is to limit the spectrum received by the sensor to the visible light range.
UV blocking filters
This type of filter can effectively block ultraviolet rays with wavelengths below 380 nm and reduce the blue component in the light. Modern sensors are more sensitive to blue light, so UV-cut filters can significantly improve image quality and avoid image distortion or overexposure caused by excessive blue light.
IR-cut filters
For infrared light with wavelengths longer than 780 nm, IR-cut filters can effectively block these long-wavelength rays. This function is particularly important for cameras equipped with infrared-sensitive sensors, because infrared light may interfere with image acquisition, causing unnecessary noise or blur.
In addition, UV/IR-cut filters are often used as a sensor or lens protection device. Replacing filters is obviously more economical than replacing expensive cameras or lenses.
Application areas of filters
In industrial applications, UV-Cut and IR-Cut filters have a wide range of uses, covering multiple fields:
1. Machine vision: In automated production lines and inspection systems, machine vision requires high-precision image acquisition, and UV/IR-cut filters can ensure that the sensor only receives visible light, thereby improving image quality and detection accuracy.
2. Traffic monitoring: In traffic monitoring systems, cameras are often exposed to complex light environments, such as strong sunlight or night lights. UV/IR blocking filters can filter out unnecessary ultraviolet and infrared interference, providing a clearer monitoring picture.
3. Security and monitoring: In security cameras, UV/IR blocking filters can improve image quality, make the captured images more realistic and detailed, and help identify key details.
Conclusion
UV-Cut and IR-Cut filters are indispensable and important components in industrial applications. They not only play an important role in improving image quality, but also provide an additional layer of protection for equipment. Whether in machine vision, traffic monitoring or security, these filters have demonstrated their excellent performance and reliability. In the future, with the continuous development of industrial technology, the application scope and importance of UV/IR blocking filters will be further expanded.