A laser measurement system indicates the difference between an actual position of a vehicle frame reference point on a vehicle frame and a normal position employing a rotating laser scanner; an electro-optical detector and a host computer. The mold frame forms an internal space that receives a backlight unit. An imaginary line connecting the two posts is not parallel to either diagonal of the mirror plate. The measured absorption spectrum is cross-correlated with a calibration absorption model spectrum for the absorption lines at several temperatures, pressures, and concentrations generated prior to the measurement. The second end of the actuator is divided into a plurality of electrode parts by a plurality of slits which pass through the first electrode film, the piezoelectric film and the second electrode film, at least a part of each electrode part is linked to parts of adjacent electrode parts, and each electrode part is capable of generating bending deformation individually.