AUTOMATIC ADJUSTMENT DEVICE FOR OPTICAL AXIS OF SURVEYING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To automatically adjust so that the optical axes in a collimation optical system and a transmission optical system are coaxial. SOLUTION: Distance measuring light having a peak in a specified area is transmitted from a light-emitting device 20. The distance measuring light is transmitted from a lens 11 via a first reflection mirror 23 and a second reflection mirror 24. The reflected light is entered into a reflection mirror 12 for a specified area. The reflection mirror 12 for the specified area has a reflection area and a transmission area. Only the light in the peak area of the distance measuring light is reflected from among the reflected light in the reflection area. The entered light is transmitted in the transmission area. The light reflected in the reflection area is entered into a photo-electric conversion element 32. The light transmitted through the transmission area is entered into a position detection sensor 41. The position detection sensor 41 detects the dislocation between a position receiving the reflected light and a position corresponding to the cross-hair on a focus mirror 15. A system control circuit 40 transmits a control signal to a mirror rotation mechanism 43 based on the detected dislocation. The mirror rotation mechanism 43 rotates the first reflection mirror 23 based on the control signal.