Optical path pointing apparatus, optical path pointing method, and optical path pointing system

An optical path pointing method, wherein the method comprises:

• transmitting, by a first optical path pointing apparatus, a first beacon light to a second optical path pointing apparatus;
• receiving, by the first optical path pointing apparatus, the first beacon light reflected by a second prism in the second optical path pointing apparatus;
• and
• adjusting, by the first optical path pointing apparatus, a first alignment angle of the first optical path pointing apparatus based on first information of a position at which the first beacon light reflected by the second prism reaches a first position sensitive detector in the first optical path pointing apparatus, thereby generating an adjusted first alignment angle that satisfies a first pointing precision threshold.

An optical path pointing system, comprising:

• a first optical path pointing apparatus and a second optical path pointing apparatus, wherein the first optical path pointing apparatus comprises:
• a first optical transceiver;
• a first position sensitive detector;
• and
• a first adjuster, wherein
• the first optical transceiver is configured to transmit a first beacon light to a second optical path pointing apparatus, and configured to receive the first beacon light reflected by a second prism in the second optical path pointing apparatus;
• the first position sensitive detector is configured to:
• determine a first alignment angle of the first optical path pointing apparatus based on first information of a position at which the first beacon light reflected by the second prism reaches the first position sensitive detector, and send the first alignment angle to the first adjuster;
• and
• the first adjuster is configured to adjust the first alignment angle thereby generating an adjusted first alignment angle that satisfies a first pointing precision threshold.