Rangefinder apparatus

A rangefinder apparatus comprising:

• a light-projecting section for successively projecting toward an object at a distance to be measured a reference beam, a first correction beam, and a second correction beam having an identical emission center-of-gravity position with respect to a base-length direction and respective emission light intensity distributions different from each other;
• a light-detecting section for detecting reflected light of the beam projected to the object from said light-projecting section at a light-detecting position corresponding to the distance to the object, and outputting distance information corresponding to the light-detecting position;
• and
• correcting means which determines a correction value by correcting a beam eclipse with reference to a correction expression according to respective distance information items output from said light-detecting section when the beam projected from said light-detecting section is the reference beam, the first correction beam, and the second correction beam, and adds the correction value to the distance information output from said light-detecting section when the projected beam is the reference beam, to determine the distance to the object.