What is the purpose of an IR cut filter in video cameras?

The purpose of an IR cut filter in video cameras is to block infrared light from reaching the sensor. This is essential for maintaining color accuracy in images captured during daylight. Infrared light can cause colors to appear distorted and unsure, particularly during daylight conditions, where visible light is abundant. By filtering out infrared light, the camera can ensure that the sensor receives only the visible spectrum, resulting in more accurate and true-to-life color reproduction.

In addition to maintaining proper color fidelity during the day, the use of an IR cut filter is particularly relevant in cameras equipped with low-light performance features, as it can be removed in low-light situations to allow more infrared light to be captured, improving night vision capabilities. However, the primary function of the filter itself is indeed to block infrared light during normal operating conditions, which is why this choice is the correct answer.