Patent ID: 8498504

Claim:
An integrated optical transmission board, comprising: a first optical transmission board comprising a first optical transmission line; a second optical transmission board comprising a second optical transmission line; an optical coupling structure which is disposed between the first optical transmission board and the second optical transmission board, and comprises a third optical transmission line configured to connect optically between the first optical transmission line and the second optical transmission line; a plurality of mounting portions which are interposed between the first optical transmission board and the second optical transmission board, and configured to connect fixedly the first optical transmission board and the second optical transmission board outside the optical coupling structure, wherein the first optical transmission board further comprises a first engagement portion comprising one of a projection and a cavity in an area thereof opposing to the optical coupling structure, the optical coupling structure further comprises a second engagement portion comprising one of a projection and a cavity, the second engagement portion being in an area thereof opposing to the first optical transmission board and is configured to engage with the first engagement portion, and the first engagement portion and the second engagement portion have a combination of a projection and a cavity.