| 摘要 |
A ground illuminator for an external vehicle rearview mirror comprises an electrical light bulb installed in a housing having a transparent primary lens. A secondary lens it is interposed between the housing and the primary lens, and is spaced from the primary lens. The spacing between the lenses reduces the thermal conductivity between the lenses and provides a channel for airflow between the lenses, thereby minimizing the temperature of the primary lens due to illumination of the light bulb.
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