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Abstract

An optical system unit for optical transceiver is fabricated integral with lenses by molding of a resin material for providing a desired level of the optical characteristics with no use of mirrors. The optical system unit for optical transceiver 201 for optically coupling with a connector 202 having a fiber optic cable 205 has a pair of convex lenses 212 and 213 thereof provided to face the coupling end of a transmission optical fiber 203 and the coupling end of a reception optical fiber 204 respectively. The two lenses 212 and 213 may be identical in the optical characteristics. A lead frame 215 having two steps is provided beneath the two lenses 212 and 213. A light emitting device 216 and a light receiving device 217 are mounted on the two, upper and lower, steps of the lead frame 215 respectively. The lead frame 215 is carefully bent at a certain angle, aligned with the axes of the optical fibers, and embedded in the resin material. In the molding of the resin material, the two convex lenses 212 and 213 are formed integrally. The optical system unit 201 employing no mirrors can hardly be susceptible to a change in the ambient temperature.

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First Claim