The present invention relates to the field of
optical film detection technology, and specifically to an
optical film defect detection device and a detection method thereof, comprising a frame, a
CCD camera, a light board, a conveying roller, a motor, a
leveling mechanism, a leveling plate, a centering mechanism and a centering plate; adjustment cavities are symmetrically opened on both sides of the frame, and a
CCD camera is fixedly installed on the top of the frame; a light board is correspondingly installed below the
CCD camera; conveying rollers are installed at both ends of the frame, and the conveying rollers are connected to the motor; the
leveling mechanism is located on both sides of the frame, and the leveling plate is connected to the frame through the adjustment cavity, and when the conveying roller transports the
optical film, the conveying roller drives the leveling plate to reciprocate through the
leveling mechanism; the centering mechanism is installed on the frame and is located in front of the leveling mechanism; when the leveling plate reciprocates, the leveling plate drives the centering plate to move in a centering manner through the centering mechanism. The present invention allows the optical film to remain centered and flat during the detection process through
reciprocating motion, thereby improving the quality of optical film defect detection.