| 摘要 |
PURPOSE:To extend the service life of a light emitting element by setting a required minimum luminous intensity to the light emitting element for optical communication in response to its transmission distance. CONSTITUTION:A signal from a signal transmission circuit 7 at an optical communication equipment main body 4 is received by a signal reception circuit 8 via a loopback circuit 6 at an optical communication equipment main body 5 and a check circuit 13 checks with the original signal and a luminous intensity of a light emitting element 1 is set to a required minimum intensity based on the result in response to the distance and a reception sensitivity of an opposite light receiving element 2' to reduce the power consumption and then the deteriorating speed of the light emitting element 1 itself by heat reduction is suppressed and the service life is extended. |
