What does an infrared cut filter do in a CCTV camera?

An infrared cut filter plays a crucial role in maintaining color accuracy in CCTV cameras, particularly during daylight hours. When incorporated into a camera, the filter blocks infrared light, which can interfere with the camera’s ability to capture true colors of an environment.

During the day, natural light contains a spectrum of colors that is essential for accurate imaging. If infrared light were allowed to pass through, the camera might record images that have color distortion, often appearing too warm or overly saturated. By filtering out this infrared light, the camera can produce clearer, more accurate colors, allowing for effective surveillance and monitoring.

In contrast, options related to enhancing low-light visibility, increasing the field of view, or reducing noise do not pertain to the primary function of an infrared cut filter. Enhancing low-light visibility is typically associated with other technologies such as low-light sensors or infrared illuminators, while field of view adjustments relate more to the camera's lens design rather than the filter itself. Noise reduction is a separate aspect that pertains to image processing rather than the function of an infrared cut filter.