OPTICAL SPACE TRANSMISSION SYSTEM AND OPTICAL TRANSMITTER AND OPTICAL RECEIVER, AND OPTICAL TRANSMITTER-RECEIVER

• Main Authors: KISHI TOMOMI, SERA KIYOAKI, MIKAMO KATSUMI
• Format: Patent
• Language: English
• Published: 11.10.2002
• Edition: 7
• Subjects: BASIC ELECTRONIC CIRCUITRY; CONTROL OF AMPLIFICATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PROBLEM TO BE SOLVED: To provide an optical space transmission system that can prevent deterioration in the communication quality even under exposure by the sun ray or under a bad weather so as to improve the reliability and to provide an optical transmitter, an optical receiver and an optical transmitter-receiver. SOLUTION: In the optical space transmission system comprising the optical transmitter 1 with a communication light transmission means 11 transmitting a communication light and the optical receiver 3 with a communication light receiving means 31 receiving the communication light transmitted through space, the optical receiver 3 is provided with a background light detection means 32 that detects the intensity of the background light around the communication optical reception terminal 35, a luminous quantity revision means 33 that revises the luminous quantity received by the communication light receiving means 31, and a background light intensity transmission means 34 that transmits the background light intensity detected by the background light detection means 32 to the optical transmitter 1, and the optical transmitter 1 is provided with a background light intensity reception means 12 that receives the background light intensity sent form optical receiver 3 and an output revision means 13 that revises the optical transmission output of the communication light transmission means 11.