| 摘要 |
Disclosed is an apparatus for inspecting negatives which is provided with a laser beam generating source, a scanner for scanning the laser beam, a holding device for holding a negative having a pattern formed in a reflective area on a first surface of a transparent plate and transferring the negative in a direction perpendicular to the scanning direction of the laser beam, a first converging lens for converging the laser beam on said first surface, a second converging lens for converging on a first photocell the beam transmitted through the negative, a third converging lens for converging on a second photocell the beam reflected by the first surface of the negative, and a comparator for comparing a first signal stream put out from the first photocell and a second signal stream put out from the second photocell and detecting an undesirable adhering matter. |
