| 摘要 |
<P>PROBLEM TO BE SOLVED: To scan a printed circuit board by two lights and to prevent the effect on a measured value due to the difference between optical characteristics of two lights while improving scanning efficiency. <P>SOLUTION: Two lights, that is, beams A and B are received at predetermined different incident angles by a polarizer 4 over a range to be scanned on the solder printed printed circuit board and emitted while deflected in the direction of the range to be scanned to perform scanning. At this time, the polarizations and powers of the beams A and B are adjusted so as to become same by a branch part 1b and a variable means 1c. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
