Lexus LS 600h L 2015 Owner's Manual page 301

Camera sensors (if equipped)
The camera sensors detect pedestrians and other three-dimensional
objects on or near the road ahead together with the radar sensor while
the vehicle is moving.
When the headlights are on, near-infrared rays are projected to ensure
proper detection performance in the night time.
Camera sensors
1
Near-infrared ray transmitters
2
Driver monitor sensor (vehicles with driver monitor system)
The driver monitor sensor detects
the direction the driver is facing and
whether the driver' s eyes are open
or closed.
The system determines whether the
driver is facing forward and whether
or not the driver' s eyes are closed.
LS600hL_U(OM50E41U)
4-5. Using the driving support systems
299
4