Deflecting device and surveying instrument

A surveying instrument comprising:

• a distance meter including:
• a light emitting element configured to send out distance measuring light;
• a distance measuring light emitter configured to emit the distance measuring light;
• a receiver configured to receive reflected distance measuring light;
• and
• a light receiving element configured to receive the reflected distance measuring light and to generate a light reception signal, the distance meter being configured to measure a distance to a measurement target object on a basis of the light reception signal from the light receiving element;
• an optical axis deflector disposed on a distance measuring optical axis and configured to deflect the distance measuring optical axis;
• an emission direction detector configured to detect a deflection angle of the distance measuring optical axis;
• and
• a computation controller configured to control deflecting action of the optical axis deflector and distance measuring action of the distance meter, to measure a horizontal angle and a vertical angle of the measurement target object on a basis of the deflection angle detected by the emission direction detector, and to acquire three-dimensional coordinates of the measurement target object on a basis of a distance value from the distance meter and the horizontal angle and vertical angle.