SPATIAL OPTICAL TRANSMISSION DEVICE

PROBLEM TO BE SOLVED: To provide a spatial optical transmission device capable of making a transmission distance long.SOLUTION: A spatial optical transmission device 10 includes: a light-emitting part 20 for converting an electric signal into an optical signal of a first wavelength band; a transmission part 12 for transmitting information through a space by emitting the optical signal of the first wavelength band converted by the light-emitting part 20 into the space; a light reception part 26 for converting light input from the outside into an electric signal; and a reception part 14 for receiving information transmitted from the outside by an optical signal of a second wavelength band set at a wavelength band different from the first wavelength band from the electric signal converted by the light reception part 26. The reception part 14 includes a filter 24a for shielding light of the first wavelength band from the light input from the outside.SELECTED DRAWING: Figure 1 【課題】伝送距離の長距離化が可能な空間光伝送装置を提供する。【解決手段】電気信号を第１波長帯の光信号に変換する発光部２０を備え、発光部２０が変換した第１波長帯の光信号を空間に放出して空間を通じて情報を送信する送信部１２と、外部から入力される光を電気信号に変換する受光部２６を備え、受光部２６が変換した電気信号から第１波長帯と異なる波長帯に設定された第２波長帯の光信号によって外部より送信された情報を受信する受信部１４と、を備える空間光伝送装置１０において、受信部１４は、外部から入力される光から第１波長帯の光を遮断するフィルタ２４ａを備える。【選択図】図１