| 摘要 |
The present invention is provided with: an optical transmission unit (25) that converts image signals into optical signals, said image signals having been generated by means of an image pickup unit (24); a dividing unit (28) that divides, into first optical signals and second optical signals at a predetermined optical quantity ratio, the optical signals thus converted by means of the optical transmission unit (25); and an abnormality detection unit (35) that detects whether there is an abnormality in the optical connection units (30a, 31a) on the basis of optical quantity information of the first optical signals received by means of an optical reception unit (34) via optical cables (27b, 39a) and optical connection units (30a, 31a), and light quantity information of the second optical signals, said optical quantity information being electrical signals obtained by converting the second optical signals, and being included in electrical signals transmitted by means of electrical cables (27c, 39b). |
