Laser rangefinder having common optical path

A laser rangefinder having common optical path comprising:

• a housing assembly;
• and
• a laser module received in the housing assembly, the laser module comprising:
• a frame having a tubular body, and a laser emitting apparatus, a laser receiving apparatus and a reference point indicating apparatus mounted in the frame,
• wherein a light path of the laser emitting apparatus and a light path of the laser receiving apparatus are configured to be independent to a light path of the reference point indicating apparatus, and an optical axis of the light path of the laser emitting apparatus shooting at a target object and an optical axis of the reference point indicating apparatus are collinear;
• the laser emitting apparatus comprises a laser emitter for emitting a laser beam which is arranged under a bottom side of the tubular body, a first holophote for reflection of the laser beam which is inclinedly arranged in front of the laser emitter, a first laser focusing lens for converging the laser beam to form a collimating ranging laser which is arranged above the first holophote, a bandpass filter lens for allowing the ranging laser to pass through but preventing natural light from passing through, and a dichroic mirror for reflecting the ranging laser and allowing the natural light to pass through;
• and
• the laser receiving apparatus comprises a laser receiver arranged under the bottom side of the tubular body adjacent to the laser emitter, a second holophote inclinedly arranged in front of the laser receiver at a side of the first holophote, a second laser focusing lens arranged above the second holophote, the dichroic mirror, and the bandpass filter lens.