| 摘要 |
An optical semiconductor device having high precision of optical coupling and fabricated at low cost. The device comprises a semiconductor chip used as light source 3 , lens system 6 constituted from one or more resin lenses for converging light output from the semiconductor chip used as light source 3 , a conductive base 2 for mounting the semiconductor chip 3 thereon, and lens support assembly 4 and 5 for maintaining a predetermined distance from the semiconductor chip 3 and supporting the resin lens 6 . Deviation from the image point of the lens system 6 caused by change of the refractive index of the lens system 6 due to change in temperature is compensated for by change in the distance between the semiconductor chip 3 and the lens system 6 , caused by thermal expansion of the electrically conductive base 2 and the lens support assembly 4 and 5.
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