| 摘要 |
The improved lamp apparatus comprises at least a trough-shaped main mirror having a parabolic inner surface, a pair of plane mirrors inclined at opposite ends of said main mirror in such a way as to leave the inner surface of said main mirror open, two light-emitting devices for optical communication that are provided to face said plane mirrors, and a small mirror provided around each of said light-emitting devices to reflect light toward said plane mirrors. The mirror assembly which permits light to spread only in a horizontal direction is combined with a leadframe which assures satisfactory heat dissipation even under application of a large current, thereby creating a luminous intensity distribution pattern from the lamp apparatus that covers a wide range in the horizontal direction even if it is used alone.
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