Device for acquiring images inside a vehicle, comprising an illuminator to illuminate a field of view, an image sensor that is arranged to acquire images from the field of view, and an optical element having a light-transparent portion and a light-blocking portion, wherein the light-transparent portion is arranged so that light of the illuminator being emitted to the field of view passes through the light-transparent portion, and wherein the light-blocking portion is arranged to block light of the illuminator being emitted in a direction towards the image sensor.