A process of reinforcing a closed sectional portion of a vehicle body with a two-pack urethane foam composition. The first lens is a positive meniscus lens having a convex side facing toward the image side, which has a big focusing power and is provided to capture image and for balance of aberration. According to the control of communication between two layers of latches by the control device, the new inputted data of the succeeding write operation will not overwrite the data of the current write operation, thereby reducing the limitation for the cycle of writing and increasing the write speed.