Thermal camera lenses with a focal length are designed for use with thermal cameras to capture and record infrared radiation emitted by objects or people. The focal length of a thermal camera lens is the distance from the center of the lens to the image sensor when the lens is focused at infinity. Here are some key considerations when selecting a thermal camera lens based on its focal length:
Field of view: The focal length of the lens affects the field of view (FOV) of the thermal camera. A shorter focal length lens provides a wider FOV, while a longer focal length lens provides a narrower FOV. The choice of focal length will depend on the application and the desired FOV.
Detection distance: The focal length of the lens also affects the detection distance of the thermal camera. A longer focal length lens can detect objects at a greater distance, while a shorter focal length lens is better suited for close-up imaging.
Resolution: The focal length of the lens can also affect the resolution of the thermal camera. A longer focal length lens can provide higher resolution, but at the expense of a narrower FOV.
Cost: Thermal camera lenses with longer focal lengths tend to be more expensive than those with shorter focal lengths, due to the higher precision and larger size required for their construction.