UNDERWATER OPTICAL COMMUNICATION DEVICE

PROBLEM TO BE SOLVED: To provide an underwater optical communication device capable of discovering a communication partner without failing to recognize an arrival direction of a light in the water.SOLUTION: In a first detection section, while detection direction change parts 34 and 74 move first detection light-receiving parts 32 and 72 over a predetermined area, the first detection light-receiving parts receive lights emitted from optical communicators 50 and 10 of communication partners and the first detection section detects arrival directions of the lights emitted from the optical communicators of the communication partners from light intensity distribution at positions where the lights are received by the first detection light-receiving parts. In a second detection section, while movement parts 44 and 84 move second detection light-receiving parts 42 and 82 in such a manner that the second detection light-receiving parts are moved iteratively in the predetermined area during a communication between the optical communicators, the second detection light-receiving parts receive lights emitted from the optical communicators of the communication partners, and the second detection section detects deviation between the arrival directions of the lights emitted from the optical communicators of the communication partners and directions in which receiving parts 14 and 54 receive optical signals, from light intensity distribution at positions where the second detection light-receiving parts receive the lights.SELECTED DRAWING: Figure 2 【課題】水中において光の到来方向を見誤ることなく通信相手を発見することができる水中光通信装置を提供する。【解決手段】第１検出部は、検出方向変更部３４、７４が予め定められた領域全体にわたって第１検出受光部３２、７２を移動させながら、第１検出受光部が通信相手の光通信機５０、１０から放出された光を受光し、第１検出受光部が受光した位置における光強度分布から通信相手の光通信機から放出された光の到来方向を検出する。第２検出部は、光通信機間の通信中に、第２検出受光部４２、８２が予め定められた領域を繰り返し移動するように移動部４４、８４が第２検出受光部を移動させながら、第２検出受光部が通信相手の光通信機から放出された光を受光し、第２検出受光部が受光した位置における光強度分布から、通信相手の光通信機から放出された光の到来方向と受信部１４、５４が光信号を受光する方向とのズレを検出する。【選択図】図２