When determining a range of distance to an object or vehicle in front of or behind the host vehicle, image data of the object is captured and analyzed to determine the relative location of the object relative to the bottom of an image frame containing the object as well as with a feature measurement of the object measured in pixels across a plurality of image frames. During a first scanning, radiation is applied to the front surface of a frame of developing film and the radiation reflected from the front surface of the film is sensed using a single sensor unit. The FET also includes a second dielectric layer formed on the body contact region. One or plurality of first sensors mounted on a wall defining the water tank chamber may detect the movable member. A liquid crystal material is injected between the first and the second substrates. p and q are positive numbers satisfying the expressions 0<p<1.