| 摘要 |
The present invention relates to an elevator surveillance system and a method for adjusting the focus of transmitted light thereof, the system being capable of adjusting the focus of light signals transmitted from a light emitter to a light receiver by using visible band light signals and capable of transmitting, as invisible band light signals, surveillance images captured of the inside of an elevator. The elevator surveillance system according to the present invention comprises: a light-transmitting unit comprising a first light emitter for emitting visible band light signals and a second emitter for emitting invisible band light signals; a fixing implement for fixing the light-transmitting unit; adjustment bolts for fixing the light-transmitting unit by being inserted into the respective corners of the fixing implement and for adjusting the focus of the visible band light signals emitted from the first light emitter; and a light-receiving unit for receiving the visible band light signals or receiving the invisible band light signals. |
