Abstract: An optical transmission device configured from a case that holds an optical element that receives and/or transmits light, the case being provided with a plug insertion hole into which a plug for transmitting an optical signal is inserted; and a shutter mechanism having a shutter that opens and closes the plug insertion hole; wherein the case is provided with an installation part that holds the shutter such that it can rotate freely, and wherein the shutter mechanism can be installed from the outside to the installation part.

Abstract: A jack module for optical transmission has, on a holder body into which a specified plug is to be inserted, an optical semiconductor device for inputting and outputting an optical signal via the plug. The optical semiconductor device is so constructed that a light-emitting chip and a light-receiving chip are mounted on a one-side surface of a lead frame, where the light-emitting chip and the light-receiving chip are integrally molded with a light-pervious resin. The surface of the lead frame is disposed so as to be inclined with respect to a center axis of the plug inserted into the holder body. The jack module for optical transmission is capable of easily performing communications in the half-duplex method, simple in construction and manufacturable at small size and low cost.

Abstract: An optical transmission device configured from a case that holds an optical element that receives and/or transmits light, the case being provided with a plug insertion hole into which a plug for transmitting an optical signal is inserted; and a shutter mechanism having a shutter that opens and closes the plug insertion hole; wherein the case is provided with an installation part that holds the shutter such that it can rotate freely, and wherein the shutter mechanism can be installed from the outside to the installation part.

Abstract: A jack module for optical transmission has, on a holder body into which a specified plug is to be inserted, an optical semiconductor device for inputting and outputting an optical signal via the plug. The optical semiconductor device is so constructed that a light-emitting chip and a light-receiving chip are mounted on a one-side surface of a lead frame, where the light-emitting chip and the light-receiving chip are integrally molded with a light-pervious resin. The surface of the lead frame is disposed so as to be inclined with respect to a center axis of the plug inserted into the holder body. The jack module for optical transmission is capable of easily performing communications in the half-duplex method, simple in construction and manufacturable at small size and low cost.