the orientation and if the camera is orientated upward the adjuster c or the adjuster e should be used in accordance with a degree of the orientation the generated screen is outputted on the monitor 52 of the ncu step s 551 in fig5 a as used herein the adjuster b is standard therefore the adjuster b is used to install the stereo camera in the manufacturing line and the adjuster 30 may be changed when the inspection determines to need the adjustment of the optical axis after changing the adjuster the operator pushes the execution button 61 when the ncu verifies on of the execution button 61 step s 552 in fig5 a the ipu 20 starts re measurement of the optical axis step s 208 in fig3 after the optical axis re measurement if it is determined to need the adjustment of the optical axis a trouble code representing defective adjustment of the optical axis is written on the memory incorporated in the quality inspection section 22 of the ipu 20 because it is the second measurement step s 216 in fig3 and then an u201c ng u201d screen screen 6 0 illustrated in fig8 b is displayed when it is determined that the adjustment of the optical axis is not needed at step s 209 the ncu displays an optical axis inspection u201c ok u201d screen screen 3 0 illustrated in fig6 c on the monitor 52 step s 561 in fig5 b and waits until the operator pushes the.