An attenuated phase shift mask is fabricated with a set of fully transmitting regions, some parts adjacent phase-shifting regions with a first reduced transmission and first phase shift near 180 degrees, and remaining parts adjacent phase-shifting regions with a second transmission higher than the first transmission and second phase shift lower than the first phase shift. The device also includes a color filter array including at least three kinds of color filters different in filtering wavelength region. The through-hole is positioned such that it at least partially overlays one of the one or more testing sites when at least a portion of the bottom surface of the nonconductive plate is adjacent to the device to be tested. In some versions of the system, a hydraulic pump, a clutch, and an adjustable-flow nozzle will be dedicated to each ground engaging wheel of the vehicle. Further, the light diffusion unit includes a light guide part configured to guide the light emitted by the light source; an air gap arranged on the light guide part and configured to diffuse the light provided from the light guide part; and a diffuser arranged on the air gap and configured to diffuse the light provided from the air gap towards the touch key.