| 摘要 |
An optical coupler (10) and method of manufacturing the optical coupler (10) are disclosed. The optical coupler (10) includes a light emitter (12), a light detector (18, 22), an inner mold material (30), and a precision reflector (32) for efficiently reflecting light from the emitter (12) to the light detector (18, 22). In manufacturing the coupler (10), the light emitter (12) is coupled to a first mount lead (14) and the light detector (18) is coupled to a second mount lead (20). There may be more than one light emitter (12) or light detector (18,22). A transparent inner mold material (30) surrounds and encases the light emitter (12) and light detector (18) along with a portion of the first and second mount leads (14, 20) and forms a precision molded reflector (32) over the light emitter (12) and light detector (18). The precision molded reflector (32) may be a precision molded dome (38) or a precision molded multifaceted vault (44). The precision molded reflector (32) has a reflective coating (34) for returning light from the light emitter (12) to the light detector (18, 22). The light emitter (12), light detector (18, 22), a portion of the mount leads (14, 20), and the inner mold material (30) are encased by an opaque overmold (36).
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