| 摘要 |
<p>PROBLEM TO BE SOLVED: To miniaturize an optical composite element and to reduce its cost while the protective function of the composite element is maintained by a method wherein a pair of a light-emitting element, which transmits a signal from the primary side to the secondary side, and a light-receiving element and a pair of a light-emitting element, which transmits a signal from the secondary side to the primary side, and a light-receiving element are integrated. SOLUTION: An optical composite element 1 has two normally used photocouplers (an Is for control signal transmission use and an If for feedback signal transmission use) integrated via a light intercepting shield 33 in one package in such a way that the light-emitting side of the Is and the light- receiving side of the If are counterposed. The Is on the control signal transmission side of the element 1 and the If on the feedback signal transmission side of the element 1 are intercepted light by the shield 33, a first light-receiving element 3a for control signal transmission is not influenced by light emission due to a second light-emitting element 2b for feedback signal transmission and similarly, a second light-receiving element 3b is also not influenced by light emission due to a first light-emitting element 2a. Thereby, a miniaturization of the element 1 and the cost of the element can be reduced.</p> |
