Abstract: An optical communication apparatus which comprises a printed circuit board, plural circuit elements fixed to the printed circuit board, the circuit elements having terminals extended to the printed circuit board, a photosensitive glass base fixed to the printed circuit board, various optical components accurately fixed to the glass base, the optical elements respectively having plural leads, and corresponding conductive members for electrically connecting the terminals of the circuit elements and the corresponding leads of the optical components, the conductive members each having a rigidity smaller than the rigidity of the corresponding leads of the optical components.

Abstract: A device for receiving optical signals in which optical signals from an optical fiber are focused by a lens. A holder holds the fiber and the lens and is fixed to a case. The light receiving element is included in the case and can receive the optical signals from the lens through a hole in the case. A seal covers the hole and is able to pass the optical signals from the lens to the light receiving element.

Abstract: An optical circuit device includes an optical fiber element, a lens and several holders. An inner holder which is elastic, holds the optical fiber element and a lens on the same optical axis. An intermediate holder fixes the inner holder therein. An outer holder, which is connected to an optical signal receiving device, holds the intermediate holder therein. An optical axis of the inner holder is adjusted by shifting the position of the intermediate holder in the outer holder parallel to the optical axis. Also, the optical axis is adjusted by moving the outer holder perpendicular to the optical axis.