| 摘要 |
A photo-interrupter is disclosed, which comprises a molded light emitting element unit including a first lead frame and a light emitting element mounted on and connected to the first lead frame, the first lead frame having a reflector portion, a molded light receiving element unit including a second lead frame and a light receiving element mounted on and connected to the second lead frame, the second lead frame having a different shape from the first lead frame, and an envelope molding formed in one piece with the light emitting element unit and the light receiving element unit, in which the light emitting element unit and the light receiving element unit are arranged with a predetermined gap therebetween, the envelope molding having a light guiding hole for guiding a light beam emitted from the light emitting element unit to the light receiving element.
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