OPTICAL TRANSMISSION DEVICE AND ITS ADJUSTMENT METHOD

PROBLEM TO BE SOLVED: To automatically adjust an optical axis of an optical transmission line assembling mirrors from a remote place. SOLUTION: An optical transmission device 10 is provided with a main laser device 13 outputting a laser beam for processing, inspecting, preventively preserving or correcting an object, a guide laser device 14 outputting a guide laser beam different from a main laser beam, a half mirror guide means 19 guiding the guide laser beam from the guide laser device 14 to the optical transmission line 11, sampling separation mirror means 24, 27 provided on the way of the optical transmission line 11, parallel reflection optical means 46, 49 set upon the optical paths separated by the separation mirror means 24, 27, light position detecting devices 63, 64 made incident with the reflection beams from the parallel reflection optical means 46, 49 through the half mirror guide means 19 and a controller 29 inputting the position deviational information of the beams detected by the light position detecting devices 63, 64, operation processing them and driving mirror adjusting devices 30, 31.